In 2015-calendar section Monthly Calendar and Yearly Calendar with some very useful options and information is available. You can add 2015 holidays of any country and the week number to your calendar while generating it. Apart from that you have the option to choose your week starts from Sunday or Monday. In most European and Asian countries week generally starts from Monday, and in America it is from Sunday. Here we have tried our best to provide you a simple but yet very useful calendar.