First I show you simply code to create calendar by use Jquery. You need 2 .js files and 1 css file. You can download it here. Before download deselect all components and select only one: Datepicker. On right side click to download button.
If you want to change date format, you must do one simple step:
Or this format:
Or this, if you need named your day, monday example:
Or only year?:
You can set your date format what you need.