3. The first two arguments, start-date and end-date , are required. The INTNX function returns the SAS date value for the beginning date, time, or datetime value of the interval that you specify in the start–from argument. . The age computation takes into account leap years. この関数は次の基本構文を使用します。 INTCK (間隔、開始日、終了データ、メソッド) 金： 間隔: 計算する間隔 (日、週、月、四半期、年など); 開始日: 開始日; 終了日: 終了日; method: 離散または連続方法を使用して. Every single function in a %LET needs to be wrapped, including your INTCK () and MDY (). date1 = year (date): Extracts the year component from the variable date. ); Example -. If you want to present this number of seconds as HH:MM:SS, you could use the proper format, which is the TIMEw. So for "31MAY13:00:00:00", it will give me "01MAY13:00:00:00". The code is missing the %SYSFUNC() required for using functions in macro logic. 1 About SAS Enterprise. I'm trying to get to a more precise number of months between 2 dates than given by the INTCK function. d format. In the INTCK function there is an option to set “interval”. ERROR: Unresolved reference to table/correlation name s_cases. If you use two-digit year numbers for dates, you probably need to adjust the default setting for the YEARCUTOFF= option to work with date ranges for your data, or switch to four-digit years. So if you have date-stamped stock values, you can relatively reliably count the number of trading days between a couple of dates using the INTCK('weekday',. You can use the following methods to round numbers in SAS: Method 1: Round to Nearest Integer. ; If you need to keep the original variable name of cc , but as a character variable, then use the DROP. For more information on the INTCK and INTNX functions, see INTCK and INTNX: Two essential functions for computing intervals between dates in SAS, an article by @Rick_SAS. For example, the following statements give dates relative to the bombing of Pearl. This example is copied from SAS documentation. functions as F import datetimeTo successfully process ANSI values in DS2 using SAS interval functions, such as INTCK or INTNX, you must first explicitly convert them to the appropriate SAS double-precision numeric value. The INTNX Syntax. 24619: Determine the week number of the year. That aside, I would suggest looking into the package lubridate. . Viewed 3k times. The INTCK function in SAS can be used to calculate the difference between two dates in SAS. SAS stores datatime values in seconds. I need to do further task and I don;t know how to do it. proc print data=kbc; run; I have one doubt also that intnx function I used above is also counting the days: this_month_first_date, next_month_first_date + days between them for total numbers days in month. It does the same as the Teradata EXTRACT function with the DAY keyword. For more information on this INTCK and INTNX acts, perceive INTCK real INTNX: Two essential functions for computing intervals between dates in SAS, an items by @Rick_SAS. from. Again, it is best described by a few examples. start1=input (start,yymmdd8. . Thanks,INTCK() DOES care whether the data variable is is seconds, etc. DATA dataset; set dataset; months_exact = intck ('months'. Syntax INTCK in SAS: INTCK (‘Interval’, start_date, end_date) Interval – can be in minutes, seconds, hours,weeks, days, months,quarter and year. Essas funções são usadas como parte das instruções DATA. SAS Tutorial For Beginners Date and Time Functions in SAS Date Functions with Use Case SAS Programming Tutorial For Beginners Functions in SAS INTCK Function. 03 -5 15 0. I'm not sure how to make my own intervals. INTCK/INTNX 可以对date datetime ime 格式的时间进行计算，可以使用SASriqi进行日历计算，可以按照间隔递增计算日期， 也可以计算日期之间的时间间隔 INTNX(interval,start-from,increment<,alignment>); 按间隔递增时间,不设置format则返回的是数值形式的时间。I want get number of day difference between that date and date of today. The subjects each have a start and end date that is different. The SUBSTR function returns a portion of an expression that you specify in string. When dealing with months, it measures the number of "1st of the month" dates within the interval. The sample code on the Full Code tab illustrates how to determine the exact number of years, months, and days between two SAS date values. Here are some real-world examples of how the INTCK function is used in SAS. 1. 1. I had already tried INTCK. Your then filtering based on anndats, only selecting records where b anndats value is less than a anndats or b. The INTCK function counts the number of interval boundaries between two date values or between two datetime values. Sample. I originally have the INTCK function in the "ON" section for the join, but I moved it to "WHERE" since this sped up the processing time. Re: Date difference using SAS INTCK. ) The following example shows how to determine the date of the start of the week. I know I'm probably overlooking something, but I figured that the following should show me the number or working days between two dates. For example, you can use the INTNX functions to compute the scheduled that is 308 total in of future from. In-Database Technologies. DataFrame #. The INTCK Function your utilised to calculate the difference between two dates and times. For the INTCK function, there is also a pair of arguments to deal with the analogous problem of specifying a user-desired alignment of the DTHOUR boundaries. end1=input (end,yymmdd8. "as is" without warranty of any kind, either express. 47 months. 25, and INTCK) so that the results can be compared. The following SAS program creates a temporary SAS data set called createdates that contains six date variables. SAS Code & Examples. So that we can call and refer to the INTCK as INTerval ChecK, everyone knows the INTCK function, which helps to return the integer count of the. The COALESCE function checks the value of each argument in the order in which they are listed and returns the first non-missing value. The INTNX function will compute an incremented date value, and allows the resultant interval alignment to be specified (in your case the 'end' of the month n-months hence) data have; format date_of_last_repricing end_date date9. There are -3 days between Temp and Date2, hence Days_Shift = -3. What's the best way. This was just an example to help you understand what it means. The INTCK function returns the number of time units between dates. Time intervals can be specified in ‘MONTH’, ‘WEEK’, ‘QTR’, ‘YEAR’ etc. . 年齢の計算には、intck関数をご利用になると便利です。 intck関数は、二つのsas日付値の間に何回、年（又は月）を越すかを求めるものです。 下記の使用例をご参照ください。 (実際には一日しか間隔はございませんが、1年と表示されます。) ＜プログラム. In this example, the first statement converts the values of cc , a numeric variable, into the four-character hexadecimal format, and the second statement writes the same value that the PUT function returns. Then use INTCK as you've done in your example. The INTCK function counts intervals by using a fixed starting point for the interval as opposed to counting in multiples of the interval unit. I understand there still is a discrepancy with the yrdif function but unless there are no other options with intck to get a decimal the yrdif might be my only option. The INTCK function returns the months between &start_dt and. This is the duration in seconds. Interested in speaking? Save the date and send us your ideas. INTCK is most often used to calculate complex date and time intervals - i. Thus the "weekdays" involved in the calculation of days1 are 1-2-3/4/5, where / indicates the counted boundaries. Interval – can be in minutes, seconds, hours,weeks, days, months,quarter and year Start_date and end_date are between two dates which we will be finding interval; So we will be using EMP_DET Table in our example. This page lists all possible intervals. Use them with the INTCK and INTNX functions and with procedures that support numbered lists (such as the PLOT procedure). It rounds off to the complete year i. Sample. . 33 rounded to the nearest tenth equals 3*0. sas. The INTCK function using the default discrete method counts the number of times the beginning of an interval is reached in moving from the first date to the second. When using subtraction the order should be ENDDATE - STARTDATE. The INTCK Function is used to calculate the difference between two dates and times. The INTNX function increments a date, time, or datetime value by intervals such as DAY, WEEK, QTR, and MINUTE, or a custom interval that you define. There is no interval named DAYS. I want to find EXACT months between two dates in SAS. INTCK - INT= Interval CK= Check. PROC SQL; CREATE TABLE myTable AS SELECT BIRTH_DATE, <some function> AS DAYS_BETWEEN_BIRTHDATE_AND_TODAY FROM someTable. /*Comparing different ways of computing age*/. For the time unit, you can choose years, months, weeks, days. Graphing Your CAS Output. . You can fix this by using the CONTINUOUS method in INTCK. I. SAS : INTCK Function with Examples / INTCK and INTNX: Two essential functions for computing intervals between dates in SAS - The DO Loopintck: 날짜 차이 계산 *intck('day',~) : 일자 차이 intnx: 날짜를 입력 값 만큼 이동 *intnx('month',기준 날짜, 이동할 날짜구간, '옵션') : 월 기준 날짜 이동 *옵션-'s' : 동일한 날짜-'b' : 이동한 날짜 구간의 첫번째 날-'e' : 이동한 날짜 구간의 마지막 날Returns the difference between two dates to the nearest number of months. . Difference between INTNX and INTCK Functions. . 1 day, 2 hours, 30 minutes) In this case, if I used INTCK I would need to keep the units in either days or hours, but I can't get. The following functions can assist with the conversion between ANSI and SAS: TO_DOUBLE—converts any ANSI date, time, or timestamp. . Note: The INTCK function returns the integer number of time intervals in a given time span. Then the number of calendar months crossed (produced by INTCK) will equal the number of user-specified months. INTCK function returns the integer count of the number of interval boundaries between two dates, two times, or two datetime values. . Thus, in this products you will find some. . ; 9 end; 10 run; dt=0 01JAN1960 dt=1 02JAN1960 dt=2 03JAN1960 dt=3 04JAN1960 dt=0. I found this example for custom intervals to omit holidays when counting business days in the function INTCK: I don't know how to adjust this to my holiday list. ; array holidays(6); do date. In order to determine the number of periods between two SAS dates we use the INTCK() function. . So if you want to calculate minuates by yourself you need to divide by 60. . is a character constant or variable that contains an interval name . intck(‘month’,birth,somedate) returns the number of times the first day of a month is passed between birthand somedate. In common coding parlance, you can refer to INTNX as an interval check and INTCK as an interval next function. (start_dt) Parameter 3 is the end date. It only returns hours (rounded up) and not minutes. The general form of an interval name is. Viewed 100 times 1 I have this dataset and need to calculate the days' difference between each dose date per period. Hi, i have a large data set that has details of when a client first made a deposit and the last date of deposit. The INTNX function returning a SAS date that is a specified numeric of time units go from adenine stated date. For example: An application is submitted at 1pm on 2nd Jan 2014, and now it is 10am 3rd Jan, then SLA is 4 hours (1pm to 4pm on 2nd Jan, and then 9am to 10 am on 3rd Jan) Another application is submitted at 5pm. - SAS Help CenterThe Basics. Example 3: Using Custom Intervals with the INTCK Function. This means that YRS would have been 29 for any DOB in 1975 as well as for any second date in 2004. SAS 区间函数 INTNX 和 INTCK. Maxim 1: read the documentation. intck() returns the number of interval boundaries. INTNK is used to estimate calculate the variable bonus_1. The rounding unit is a power of 10 greater than or equal to 1e-15. e. However, the sas functions such as INPUT, PUT, INTCK etc do not work inside the CONNECT TO TERADATA sql query. Ask Question Asked 3 years, 2 months ago. January 2, 2017 to January 30, 2017 ==> INTCK returns 0, since there are no "1st of the month" dates within the interval. Hence if the difference between Feb 1st and Mar 1st is 29, then the event occurred on a leap year, and imputes the missing day as 29th, otherwise, impute with 28th. 1); /*round to 1 decimal place*/ new_value2 = round (value,. COALESCE accepts one or more numeric arguments. INTCK() DOES care whether the data variable is is seconds, etc. data _null_; sdate="12mar1998"d; edate="12jun2008"d; years=intck(‘year’,sdate,edate); put years; run; output:10 years To know the interval between 2 dates in days:. The default of 'D' or discrete may not yield quite what you want. In this SAS tutorial, we will show you how to learn SAS programming on your own. The INTCK function counts the number of interval boundaries between two dates or between two datetime values. e. format. len_in_mths = intck(‘month’,start_dt,end_dt,’c’); INTCK PARAMETERS What do the parameters for intck in the above example mean. More specifically, it cares whether the value is a datetime value or a date value. It is worth to note that INTCK gives the time intervals passed between two dates as per the calendar. The input variables required for INTCK are date time, time or date. if difference between two dates are 1. If the second date is later than the first date then 0 is returned. . Note: This is Example 6. If you are moving by the unit that the values are stored in you can just use arithmetic. ) function. Here's my code: DATA newdata; SET olddata; newvariable = INTNX ('month',olddate,0,"B"); RUN; The log says: Argument 2 to function INTNX is invalid. ». com. More specifically, it cares whether the value is a datetime value or a date value. The INTCK function using the default discrete method counts the number of times the beginning of an interval is reached in moving from the first date to the second. . Many a times while working with dates we need to compare multiple dates and need to calculate the differences in days / months / years / quarters etc. Couldn't figure out why the intck function return wrong days. Given that the original question represented dates, using the HOURS interval with date values. 以下のデータセットがあったとします。. First, SAS datetime values are in seconds. SAS is headed back to Vegas for an AI and analytics experience like no other! Whether you're an executive, manager, end user or SAS partner, SAS Innovate is designed for everyone on your team. For the YRDIF and 365. 1. I am using the intck function to calculate it with the 4th arguement (method = 'C') but I think the 4th argument just works in case of years. 1, and not 0. As for 3): intck () does logically noting else than counting the rows in your working days table between two dates. INTCK and INTNX functions base the interval from the start of the respective intervals. NOTE: Mathematical operations could not be performed during %SYSFUNC function execution. SAS/ETS® User's Guide documentation. len_in_mths = intck(‘month’,start_dt,end_dt,’c’); INTCK PARAMETERS What do the parameters for intck in the above example mean. If the string is not found in source, INDEX returns a value of 0. Solved: log_date cst_id 09Dec2016 101 20Jan2016 102 16Jul2015 103 The format of column "log_date" is DATE9. It does not count the number of complete intervals between two dates: The function INTCK ('MONTH', '1jan2021'd, '31jan2021'd) returns. You can use the INTCK function in SAS to quickly calculate the difference between two dates in SAS. Hello. MONTH intervals are counted by day 1 of each month, and YEAR intervals are. 1 Answer. Difference between INTNX and INTCK functions. 6. 24567: Calculate a person's age. If only one value is listed, then the COALESCE function returns the value of that argument. Example. A previous Databricks blog post introduced Databricks and PySpark to SAS developers. LOB ,MMD. A Series is the data structure that. For instance Clent A has first_date_deposit as 15/07/2003 and last_date_deposit as 24/02/2010. So you could just subtract the two variables and divide by 60 seconds/minute to convert the units from seconds to minutes. It's joining two datasets using the amaskcd field as the key. And this is the logic: Work start time: 9am. The INTCK() function can also count backwards: when end-of-period is a date prior to start-of-period, the INTCK() function will return a negative number. ; informat date_of_last_repricing end_date date9. timedelta (18). )); put _all_; datalines; 07:00. The function INTCK ('MONTH', '1feb2021'd, '31jan2021'd) returns –1 because the first date is in a later discrete interval than the second date. options intervalds= (BankingDays=BankDayDS); data BankDayDS (keep=begin); start = '15DEC1998'd; stop = '15JAN2002'd; nwkdays = intck ('weekday',start,stop); do i = 0 to nwkdays; begin = intnx. date1 = qtr (date): Extracts the quarter component from the. INTCK() DOES care whether the data variable is is seconds, etc. It's joining two datasets using the amaskcd field as the key. Let's run a little test. The INTCK function counts the number of intervals between two dates. date1 = day (date): Returns the day of month from the variable date. I'm using SAS with SQL procedures. Timestamp ('2019-12-31') curmth=1 print (mydate1,mydate2,cumth) 2019-07-15 00:00:00 2019-12-31 00:00:00 1 # INTNX function; pd. Data Science. The variables. If "to" is before "from", the function returns a negative value. Appendixes. dev. The ROUNDZ function returns a multiple of the rounding unit without trying to make the result match. ”We would like to show you a description here but the site won’t allow us. start-date: a Date or DateTime. )); hours=intck ('hours',input (booked_from,time5. Example This program computes age using each of these methods (YRDIF, dividing by 365. Thanks a lotThe SAS intck function computes the date and time intervals for the two different dates, while the INTCK function varies on the time units. You provide the start time, the end time, and the desired interval, and the INTCK function returns the difference in seconds, minutes, or hours. The INTCK and INTNX are the types of functions that are returned with a number of. There is an enormous difference between days since 1/1/60, and seconds since midnight, 1/1/60. The INTCK function counts intervals by using a fixed starting point for the interval as opposed to counting in multiples of the interval unit. SAS provides date, time, and datetime intervals for counting different periods of elapsed time. You can also advance a date/time using the INTNX function. Person Day 1 Release Date Sales Person Day 2 Release Date Sales. CAS Action Programming with CASL, Lua, and Python. Dictionary of Language Elements. Dec 21, 2022 at 21:49. ) If you prefer to learn by watching (while listening. Re: INTCK ('minute',X1,X2) The second argument is the from value, and the third argument is the to value. Please advise. . Syntax of INTCK function: INTCK(interval , start-date-time, end-date-time, <'method'>) method: – It’s an optional parameter. The form of an interval is. For one thing, I still haven't quite figured out how to use R functions within a sqldf query, the same way I could use one of many SAS functions within PROC SQL. In addition the date values can also be aligned to start, mid or end of given interval. '. In SAS, date type variables contain the number of days between January 1, 1960, and the date specified. calendar_days =intck (' dt day', date2, date1); calendar_days1 =intck ('day', date2, date1); week_days=intck. The INTNX function returns the SAS date value for the. SAS intck function return wrong. Note: The INTCK function returns the integer number of time intervals in a given time span. Artificial Intelligence. It does not count the number of complete intervals between two dates: The following example returns 0, because the two dates are within the same month. comDon't use INTCK(). ; run; proc print data=b; run; You're using the today function. Product. end date: Ending SAS date. This function is useful for creating intervals of a specific length between two points in time. This functioning uses the following basic syntax: INTCK(interval, start dating, end data, method) where: interval: Interval the calculate (day, week, hour, quarter, year, etc. The. INTCYCLE( 'interval' ) returns the interval of the seasonal cycle, given a date, time, or datetime interval. cchex=put (cc,hex4. The string needs to be something the DATE informat can interpret. I ask this because, for a company whose fiscal year ends in (say) october, then the quarter difference between Jan (end of fiscal Q1) and Feb (start of fiscal Q2) is 1. /*Comparing different ways of computing age*/. FORMAT MY_DATETIME: DATETIME20. Third point - shrug. (INTCK returns a negative value whenever the first date is later than the second date and the two dates are not in the same discrete interval. import pyspark. . cust_field_nm eq "x_case_dte_dd" and datepart (tbl. For the YRDIF and 365. So, I've created a flag that says if Release Date = Day 1, then flag = 1 else flag = 0. In the second example, INTCK returns a value of 1 even though only one day has elapsed. It does not count the number of complete intervals between two dates: The function INTCK ('MONTH', '1jan2021'd, '31jan2021'd) returns. . INTCK: week 2 01aug60. For example, if you are using the INTCK function to count the months between two dates, regardless of the actual day of the month specified by the date in the beginning value, SAS treats it as the first of that month. The SAS INTCK Function: Examples. Adj_form1=floor((intck(‘month’,dob,today)-(day(today)<day(dob)))/12); The FLOOR function in this formula will round down to the nearest whole number. If the values are true SAS datetime values, then the duration is simply the subtraction of the End minus Start times. ); start date: The start date; end scheduled: The end enter; method:. Thus, at this article you will find few. So we will be using EMP_DET Table in. About. Date2: 06/03/2011. seconds = datetime2 - datetime1 ; mintues = (datetime2 - datetime1)/60 ; You can also use the. The ROUND function is the same as the ROUNDE function except when the first argument is halfway between the two nearest multiples of the second argument, ROUNDE returns an even multiple. For the INTCK method, age is computed only as an integer. ; today = DATE (); days = today - birthday; age = floor (days / 365); DATALINES; 01 122275 02 010865 03 030586 . SAS software treats the year 2000 like any other leap year. Otherwise, fairly self-explanatory! Let's take a look at an example. . I was using INTCK to do this. intnx subsets and then joins, while intck joins and then subsets, which is why intnx was faster than intck—thanks for this clarification. And it's pretty darned close. ); put cc hex4. (To convert the SAS date value to a calendar date, use any valid SAS date format, such as the DATE9. ) If you prefer to learn by watching (while listening. data test; date=intck. , date and time intervals that don't have a direct proportional relationship to the base date or time units (days and seconds, respectively). Hi, I have two variables :rdq and datadate, I wanna calculate the days between two dates, I use the folllowing code: data f_f; set f_l2; days=intck('day', datadate, rdq); run; but the code not work all the days are '. Sep 22, 2015 at 17:21. documentation. INTCK ( interval, from, to ) ; The arguments of the INTCK function are as follows: interval. In SAS 9. The WHERE statement applies to all data sets in the preceding SET, MERGE, MODIFY, or UPDATE statement, and variables that are used in the WHERE statement must appear in all of those data sets. options intervalds= (workdays=mylib. Difference Between two dates using INTCK function in SAS: difference between two dates in days, weeks, months & year in SAS. How do I label each period study date so I can carry out an intck to. . To represent a date in a program just use a quoted string followed by the letter D. g. The INTCK function comes with arguments and argument-modifiers to enable us to perform variety of date related manipulations. There are 31 days in March, therefore Days_in_Month = 31. difference=datetime1-datetime2; format difference time8. What I have studied is that intnx function calculates the time interval b/w two date/time value but it also include that two date/time. Now I want to create a new variable such that it is the first day of the corresponding month. 000. lastDaylastMonth=day (intnx ('month', current_date, -1, 'E')); INTNX Function in SAS to Calculate The Last Day of The Last Month. proc sql noprint; create table daystoOverdue_list as select distinct business_object_rk , DateDiff (DAY, value_dt, Today ()) as value_dt from case_DataTable_d as tbl where tbl. new_num=input (character-variable, 4. So putting macro code, ,especially macro definitions, in the middle of a data step is just going to confuse the humans trying to read the code. If you want to convert the text value 20150301 to the text value 20148 (This is the SAS date of March 1, 2015), you can use the INPUTN function. data temp; input ID TS HR; informat TS datetime20. Renaming date variable to perform an intck to calculate day difference. Apart from this difference, there is a minor difference in the syntax. Or create a second data step to read the data back in and run your age calculations. The example also shows how to create a DateTime variable where the date argument is a constant that SAS interprets as a Date. (start_dt) Parameter 3 is the end date. It does not count the number of complete intervals between two dates: Moving and Accessing SAS Files. the "DTDAY" tells SAS the expected values are datetime, the DT part and you want DAY as the interval returned. PG. One thing that the INTCK() function will not do is return a non-integer value, because there is no such thing as a partial interval boundary. ①結果自体は、SASテクニカルサポート「年齢の計算方法」にあるやつと同じになる。. . This was not a stated requirement of the original problem. The INTNX function helps you compute the date that is 308 days away in the future from a specific date. (c -continuous) INTCK METHOD Methods used are:The YEAR function produces a four-digit numeric value that represents the year. ; datalines; 188 18Jul17:15:27:00 97 188. ),input (booked_to,time5. 2, a fifth argument to the INTCK function was added which will also help calculate a person's age. 25. For instance, to my historical browse IODIN use the INTCK function at determine the count of days between dual dates. I know how to do it and you can see the code below. The function INTCK ('MONTH', '1feb2021'd, '31jan21'd) returns –1 because the first date is in a later discrete interval than the second date. please try the below code which will output only the expected records, i wrote in datastep. You need to apply a format to the date value so it displays properly. Remember the macro processor (the macro pre-processor) finishes its work before the resulting text is passed onto SAS itself to interpret. To find the difference in values of variable between observations just use the DIF () function (related to the LAG () function). days=intck ("day", start, end+1); But since DATE values are just number of days you can also just subtract. The form of the INTCK function is: INTCK ( interval, from, to ) ; The arguments of the INTCK function are as follows: interval is a character constant or variable that contains an interval name. ) start date: The start date; end date: The end date The function INTCK ('MONTH', '1feb2021'd, '31jan2021'd) returns –1 because the first date is in a later discrete interval than the second date. Accessing Data. The INTCK function returns one number of time units between two data. The increment is based on a starting date, time, or datetime value, and on the number of time intervals that you specify. Then print variables from that data set. Since DATE values are stored in days you can use subtraction to calculate differences in days. By using multipliers and shift indexes, you can create multiples of intervals and shift their starting point to construct more complex interval specifications. If you want today's year you can use the date () function (or its alias today ()) and then use the year () function to extract the year. ; sasdate=to_double(date'2011-03-15'); x=intnx('week', sasdate, 1, 'same'); put x; / returns 22MAR2011 returns 22MAR11. days=end - start + 1 ; Share. data temp; x = '12345'; new_x = input (x,5. How can I get the difference of the month, which is 1. As will be shown in this document, almost any operation that can be applied to a data set using SAS’s DATA step, can also be accomplished in pandas. Explanation. SUBSTR extracts a portion of the value by stating. 01jan60. ; input fname :$12. It easy to play with the dates using INTNX. current_year = year (date ());NOTE: Invalid argument to function DATDIF(19996,19774,'30/act') at line 92 column 19. Because start_dt - 1 will fall in previous month and will add '1' to the result of intck. INTCK is not needed. The difference between these two dates is 10 days but just because the month has changed from March to April, the INTCK function (with discrete method) considers the difference between them to be 1 month. . The form of the INTCK function is . 3 SAS Date and Date/Time variables In order to properly use SAS date and datetime variables, you first have to determine in a variables is: Numeric or CharacterThe first part of the code uses the intck function to calculate the number of times a 'month boundary' (e. It enables you to make detailed calculations for specific time periods. Thanks a lot for your reaction! What I try to accomplish is the following: I have a dataset that has monthly observations for the following variables from CRSP (i. The YRDIF function can compute a person’s age. I need to count 30 days after the flag = 1. The last date of the last month can be calculated using INTNX function with alignment= 'E'. . Start date and end date would still be in the. There is an enormous difference between days since 1/1/60, and seconds since midnight, 1/1/60.