app/assets/javascripts/config/datepicker.coffee
$(document).on 'ready page:load', ->
match = window.location.pathname.match(/\/(en|pl)\//i)
locale = if match then match[1] else 'en'
$.datepicker.setDefaults($.datepicker.regional[locale]);
$('.datepicker').datepicker
dateFormat: 'dd.mm.yy'
firstDay: 1
minDate: '+1d'
numberOfMonths: 2
beforeShowDay: (date) ->
[date.getDay() != 0, '']