 
 This  year's Ostara and Vernal (Spring) Equinox will be with us on Tuesday, 20th March (at 05:14:01 London time for  those who love to be specific)  
Also known as:- Oestra, Ostara,  Eostre, Vernal or Spring equinox, Alban Eilir or Lady Day, first day of  spring and so dates vary from year to year.
It is a time when both day and night are equal and so a time of balance.
See More at link below
 
Why do Xians celebrate a "pagan" Holyday?   Modern-day Easter is derived from two ancient traditions: one  Judeo-Christian and the other Pagan. Both Christians and Pagans have  celebrated death and resurrection themes  following the Spring Equinox  for millennia. Most religious historians believe that many elements of  the Christian observance of Easter were derived from earlier Pagan  celebrations.
 The equinox occurs each year on March 20, 21 or 22. Both Neonaturalists and  Christians continue to celebrate religious rituals linked to the equinox.  Neonaturalists usually  hold their celebrations on the day or eve of the equinox. Western  Christians celebrate  Easter on the  Sunday on or after the full moon  that follows the nominal date of the Equinox -- MAR-21. 
[Picture: Eástre (1909) by Jacques Reich.] 
Origins of the name "Easter": 
The name "Easter" originated with the names of an ancient Goddess and God. The Venerable Bede, (672-735 CE.) 
a Christian scholar, first asserted in his book De Ratione Temporum  that Easter  was named after Eostre (a.k.a. Eastre). She was the Great  Mother Goddess of the Saxon people in Northern Europe. Similarly,  the "Teutonic  dawn goddess of fertility [was] known variously as Ostare, Ostara,  Ostern, Eostra, Eostre, Eostur,  Eastra, Eastur, Austron and Ausos." 1  Her name was derived from the ancient word for spring:  "eastre."  Similar Goddesses were known by other names in ancient cultures around  the Mediterranean, and were celebrated in the springtime. Some were: 
| 
 | Aphrodite from ancient Cyprus, | 
| 
 | Ashtoreth from ancient Israel | 
| 
 | Astarte from ancient Greece | 
| 
 | Demeter from Mycenae | 
| 
 | Hathor from ancient Egypt | 
| 
 | Ishtar from Assyria | 
| 
 | Kali, from India | 
| 
 | Ostara a Norse Goddess of fertility. | 
So maybe the following makes more sense, or not. Either way it is more fun and entertaining. Enjoy!
http://www.southparkstudios.com/full-episodes/s11e05-fantastic-easter-special