What's the most efficient way get the first day of the current month?

Question

With ruby I\'m trying to get format a date as such: 2009-10-01

Where I take the current date (2009-10-26) and then change the day to \"01\".

I know of ways to do

Answer 1

require 'active_support/core_ext'
Date.today.beginning_of_month

Answer 2

Like

Date.today.beginning_of_day
Date.today.end_of_day

And

Date.today.beginning_of_week
Date.today.end_of_week

There also is

Date.today.beginning_of_year
Date.today.end_of_year