From: Nathan Clark <tokenshift@...>
Date: 2010-12-31T23:36:28+09:00
Subject: Re: change integer into date

> require 'date'
>  biaozun=Date.new(1970,1,1)
>  puts biaozun+1262222200/86400
> =>2009-12-31
> i have change  1262222200 into date,2009-12-31
> 1.can i change  2009-12-31  into  1262222200?
> 2.is there better way to change  1262222200 into date,2009-12-31

Methods for dealing with Unix times are in the Time class, rather than
the Date class.

irb> time = Time.at(1262222200)
=> 2009-12-30 20:16:40 -0500
irb> time.to_i
=> 1262222200
irb> time = Time.new(2010, 12, 31)
=> 2010-12-31 00:00:00 -0500
irb> time.to_i
=> 1293771600

Unfortunately, there doesn't seem to be any good way to convert from
Date to Time, other than
Time.new(date_object.to_s).