Subj : How to compute date
To   : comp.os.linux
From : michael1cat
Date : Sat Aug 14 2004 11:31 pm

avsrk@mailcity.com (Subrahmanyam Arya) wrote in message news:<25c1993e.0408111114.69eabd33@posting.google.com>...

> Given the current date and the number of days we want to go backwards
> or forwards , how do we compute the date (i.e day , month , year ) of
> the new date . What is the easy way is there any os call , which does
> that or do we need to write out own function . Any code snippets are
> appreciated .

$ date -I
2004-08-14
$ date -I -d '+10 days'
2004-08-24
$ date -I -d '-10 days'
2004-08-04
$ date -I -d '-100 days'
2004-05-06
$ date -I -d '+100 days'
2004-11-22
$ date -I -d '+3000 days'
2012-10-31
$ date -I -d '-3000 days'
1996-05-28
$ 
http://www.gnu.org/software/coreutils/manual/html_chapter/coreutils_21.html#SEC133

.