#MM-YYYY
"2011-10".split("-").reverse.join("/") => "10/2011"

function mdy($mid = "month", $did = "day", $yid = "year", $mval, $dval, $yval)
{
if(empty($mval)) $mval = date("m");
...

var d = new Date();
var y = new Array();
	y[0] = d.getFullYear();
...

def scale_dates(dates):
    rel_dates = []
    first_day = dates[0]
...

def self.at_beginning_of_interval(time, interval_type)
      #simple substraction does not (seem) to work for long intervals (summer/winter time ?)
      #and at_beginning_of_hour is not defined
...

def first_day_of_month(selected_date)
...

DateTime todayUTC = DateTime.Today.ToUniversalTime();
DateTime currentTimeUTC = todayUTC;
...

def date(date, time = false)
    date = Date.parse(date) if date.is_a? String
    day = date.strftime('%d')
...

class Article < ActiveRecord::Base

  # Find all articles in the given date range based on the published_at field
...

<?php
function fecha ()
{
...