How strftime_nolocale works

strftime_nolocale.rb

require 'date'

puts Time.now.respond_to?(:strftime_nolocale)

class Time
  Date::ABBR_DAYNAMES = %w(dom seg ter qua qui sex sab)
  alias :strftime_nolocale :strftime

  def strftime(format)
    format = format.dup
    format.gsub!(/%a/, Date::ABBR_DAYNAMES[self.wday])
    format.gsub!(/%A/, Date::DAYNAMES[self.wday])
    format.gsub!(/%b/, Date::ABBR_MONTHNAMES[self.mon])
    format.gsub!(/%B/, Date::MONTHNAMES[self.mon])
    self.strftime_nolocale(format)
  end
end

puts Time.now.strftime("%a")
puts Time.now.strftime_nolocale("%a")
puts Time.now.respond_to?(:strftime_nolocale)