Get last day of the month in Ruby
use Date.civil
With Date.civil(y, m, d) or its alias .new(y, m, d), you can create a new Date object. The values for day (d) and month (m) can be negative in which case they count backwards from the end of the year and the end of the month respectively.
=> Date.civil(2010, 02, -1)=> Sun, 28 Feb 2010>> Date.civil(2010, -1, -5)=> Mon, 27 Dec 2010
To get the end of the month you can also use ActiveSupport's helper end_of_month.
# Require extensions explicitly if you are not in a Rails environmentrequire 'active_support/core_ext' p Time.now.utc.end_of_month # => 2013-01-31 23:59:59 UTCp Date.today.end_of_month # => Thu, 31 Jan 2013You can find out more on end_of_month in the Rails API Docs.