SharePoint 2010 Color Calendar 2 steps (Nested if else Conditions 19 nested if conditions)

Add the calculated column "colorCalendar" in sharePoint calendar list, and paste the following in the formula field :

="<div style='width:100%;background-color:"&IF(Category="meeting","#4FDB51",IF(Category="work hours","#F08616",IF(Category="holiday","#F55875",IF(Category="gifts","#F558D5",IF(Category="A","#9932CC",IF(Category="B","#FFD700",IF(Category="C","#00FF00",IF(Category="D","#FAF0E6",IF(Category="E","#FF00FF",IF(Category="F","#CD853F",IF(Category="G","#BC8F8F",IF(Category="H","#008080",IF(Category="I","#FFFF00",IF(Category="J","#9ACD32",IF(Category="K","#F5F5F5",IF(Category="L","#A52A2A",IF(Category="anniversary","#DC143C",IF(Category="get-together","#E0F558",IF(Category="birthday","#6E80FA","#FF4040")))))))))))))))))))&";'> "&Title&"</div>"

The possible nested if else conditions in SharePoint 2010 is 19, all those profiles which says it is less than this are wrong. This calculated field working great at my end

Go to Calendar View and set "colorCalendar" for the month view title, week view title and day view title.

Now add a content editor web part in the calendar page and paste the following script to change color background color of calendar events :

<style>
.ms-acal-time {
	DISPLAY: none
}
.ms-acal-selected {
	PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; BACKGROUND: 0% 50%; PADDING-TOP: 0px
}
.ms-acal-item {
	PADDING-BOTTOM: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; BACKGROUND: 0% 50%; PADDING-TOP: 0px
}
.ms-acal-sdiv SPAN {
	MARGIN-LEFT: 0px
}
.ms-acal-sdiv DIV.ms-acal-title SPAN {
	MARGIN-LEFT: 0px
}
.ms-acal-rootdiv DIV {
	PADDING-BOTTOM: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 100%; PADDING-TOP: 0px
}</style>
<script>
// Color coded calendars for SharePoint 2010
// load our function to the delayed load list
_spBodyOnLoadFunctionNames.push('colorCalendarEventLinkIntercept');
// hook into the existing SharePoint calendar load function
function colorCalendarEventLinkIntercept()
{
  var OldCalendarNotify4a = SP.UI.ApplicationPages.CalendarNotify.$4a;
  SP.UI.ApplicationPages.CalendarNotify.$4a = function () 
    {
      OldCalendarNotify4a();
      colorCalendarEventLinks();
    }
}
// hide the hyperlinks
function colorCalendarEventLinks()
{
  // find all DIVs
  var divs = document.getElementsByTagName("DIV");
  for (var i=0;i');
divs[i].title = divs[i].title.substring(0, divs[i].title.indexOf('<')) + divs[i].title.substring(divs[i].title.indexOf('>')+1, divs[i].title.lastIndexOf('<'));
    }
   // find "x more items" links and re-remove links on Expand/Contract
    if (divs[i].className.toLowerCase()=="ms-acal-ctrlitem")
    {
      var links = divs[i].getElementsByTagName("A");
      if (links.length==1)
      {
        links[0].href="javascript:colorCalendarEventLinks();void(0);"
      }
    }

  }
}</script>