Easter
Easter originally had nothing to do with Jesus. The word ‘Easter’ does not even occur in the Bible. It was a pagan festival named after the Goddess Eostre. The festival and Goddess predated Christianity by thousands of years. Christians simply digested it.
In only one of the late English translations, It is mentioned only once where it is used not as a Christian festival, but just as a synonym for the Jewish Passover.
April is the Latin name of the current month. The English name of the current month is Eostre Month. It is named after the Goddess Eostre in whose honor feasts were celebrated by Pagans this month. (Source: 8th century Latin text De Temporum Ratione).
With the introduction of Christianity, all traces of the worship of Goddess Eostre were completely wiped out from England. However, the name of Goddess Eostre still survives in several places names of England such as Eastry, Eastrea, Eastrington, etc. Eostre is the Goddess of spring and dawn. As such, she seems to be etymologically and semantically cognate (distantly related) to Vedic Goddess Usha. For more, please read “Pagan Goddesses in the Early Germanic World (Studies in Early Medieval History), Philip Shaw (1991).