topic Re: re: Number of Days between two date with Leap Year in SAS Programming

re: Number of Days between two date with Leap Year

twildone — Tue, 23 Aug 2016 17:31:44 GMT

Hi....I am trying to calculate the number of days from a clients DOB and a date. I am using INTCK Function and it seems to work until the clients DOB falls on a Leap year. Any suggestions to to fix this....Thanks

((intck('Day',input(put(client_dob,8.),yymmdd8.),input(put(date,8.),yymmdd8.),'c'))) as Number_Days

Re: re: Number of Days between two date with Leap Year

Reeza — Tue, 23 Aug 2016 17:42:53 GMT

Please post dates to indicate how the results don't match what you're expecting.

Otherwise, simply subtract the two dates to get the number of days.

Re: re: Number of Days between two date with Leap Year

Astounding — Tue, 23 Aug 2016 17:47:30 GMT

Have you checked your leap years to make sure the dates are valid? For example, if your data set contains 19930229, you should be getting an error because there is no February 29 in the year 1993.

Re: re: Number of Days between two date with Leap Year

twildone — Tue, 23 Aug 2016 18:51:50 GMT

Hi Astounding....I think you found the problem....the DOB is 19320229 and the birthdate occurring during the fiscal year from 20140401 to 20150331 is probably not a leap year.

Re: re: Number of Days between two date with Leap Year

Reeza — Tue, 23 Aug 2016 18:35:03 GMT

No the problem is 1993 is not a leap year, therefore there's no Feb 29th and that's an incorrect DOB, SAS date value.

Re: re: Number of Days between two date with Leap Year

vandhan — Wed, 08 Feb 2017 07:25:17 GMT

You have written C in the quatation marks. what is that meant for ?

please help.

((intck('Day',input(put(client_dob,8.),yymmdd8.),input(put(date,8.),yymmdd8.),'c')))

Re: re: Number of Days between two date with Leap Year

twildone — Thu, 09 Feb 2017 00:55:36 GMT

Hi Vandhan,

The 'C' is an optional parameter which refers to the method of 'Continuous'. The alternative method, which is the default method, is 'Discrete'. These optional parameters can be used when calculating the difference between two dates and the 'Continuous' method actually calculates continuous time from the start-of-period date specified in the second parameter of INTCK function.