topic Last week day before the date in SAS Programming

Last week day before the date

SASdevAnneMarie — Fri, 27 Oct 2023 07:50:01 GMT

Hello Experts,

I have a question : if my date is, for example, '15Jan2021:0:0:0'dt, and I would like to find the last friday before this date, there is some function in SAS ?

Thank you very much !

Re: Last week day before the date

JosvanderVelden — Fri, 27 Oct 2023 09:39:39 GMT

Please run the code below and see if that works for you.

data work.have;
   input mydate:datetime15.;
datalines;
15Jan2020:0:0:0
15Jan2021:0:0:0
15Jan2022:0:0:0
15Jan2023:0:0:0
19Oct2023:0:0:0
20Oct2023:0:0:0
21Oct2023:0:0:0
;
run;
   
data want;
   set have;
   thisweekFriday = intnx('week.6', datepart(mydate), 0);
   lastweekFriday = intnx('week.6', datepart(mydate), -1);
   format mydate datetime18. thisweekFriday lastweekFriday date9.;
run;

Re: Last week day before the date

SASdevAnneMarie — Fri, 27 Oct 2023 09:47:57 GMT

Thank you very much !

Re: Last week day before the date

PaigeMiller — Fri, 27 Oct 2023 10:02:09 GMT

I am confused as the title and text do not agree. In one case you ask for last weekday, and in the other case you ask for last Friday. These are not the same. Which do you really want?

Re: Last week day before the date

SASdevAnneMarie — Fri, 27 Oct 2023 10:05:27 GMT

Sorry, It is actually day (friday) of last week before the date.