# Date additon / subtraction - just the basics

**URL:** <https://discuss.rubyonrails.org/t/date-additon-subtraction-just-the-basics/8416>\
**Category:** rubyonrails-talk\
**Created:** [February 8, 2007, 3:26pm UTC](https://discuss.rubyonrails.org/t/date-additon-subtraction-just-the-basics/8416 "2007-02-08T15:26:28Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Charly](https://avatars.discourse-cdn.com/v4/letter/c/9d8465/32.png) [@Charly](https://discuss.rubyonrails.org/u/Charly)\
**Post date:** [February 8, 2007, 3:26pm UTC](https://discuss.rubyonrails.org/t/date-additon-subtraction-just-the-basics/8416/1 "2007-02-08T15:26:28Z")

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check this : [http://errtheblog.com/post/44](http://errtheblog.com/post/44)

x = "2/4/2007".to\_time y = 1.week.ago(x) z = 2.days.since(x)

Charly