From: Daniel Lucraft <dan@...>
Date: 2007-07-04T00:19:22+09:00
Subject: Re: How do I add x months to a date

Ben Edwards wrote:
> I have a date
> 
> my_date = Date.new( 2007, 1, 1 )
> 
> I then have a variable holding an integer
> 
> months_to_add = 4
> 
> How do i add 'months_to_add' to my_date'?
> 
> I have spent ages googeling and looking in o'reilly ruby cookbook but no 
> luck;(
> 
> Any ideas?
> 
> Ben

I would do it like this, if I didn't mind loading some helpful 
ActiveSupport junk:

irb> require 'active_support/core_ext/numeric'
=> true
irb> require 'active_support/core_ext/date'
=> true

irb> my_date = Date.new( 2007, 1, 1 )
=> #<Date: 4908203/2,0,2299161>

irb> my_time = my_date.to_time
=> Mon Jan 01 00:00:00 +0000 2007

irb> months_to_add = 4
=> 4

irb> new_time = my_time + months_to_add.months
=> Tue May 01 01:00:00 +0100 2007

irb> new_date = Date.new(new_time.year, new_time.month, new_time.day)
=> #<Date: 4908443/2,0,2299161>

best,
Dan

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