Create List View by filtering Month in SharePoint

Create a calculated filed with
=YEAR(Created)&"-"&CHOOSE(MONTH(Created),"01. January","02. February","03. March","04. April","05. May","06. June","07. July","08. August","09. September","10. October","11. November","12. December")

http://guru-web.blogspot.ae/2006/02/some-of-my-favourite-date-wss-list.html

SPEasy Form for SharePoint List customization.

Customizing list form is part of daily job. Got a new tool over internet to customize the form in a simple way.
Have a look @ http://speasyforms.com/

Hide or show list form fields in SharePoint using jQuery

David Lozzi has written a jquery library which is useful our daily development activites.
http://davidlozzi.com/2014/01/14/sharepoint-2013-script-hide-or-disable-your-fields
ExecuteOrDelayUntilScriptLoaded(function(){

  Lozzi.Fields.disableWithAllowance("Employee Name",["LeaveEntryAuthorization"]);

  },"sp.js");

sp.js should load before execute the code.