Easter and Christmas have pagan origins. Many of us were told that since birth. The evidence? Snippets of quotes printed in the WT, from the Encyclopeadia Britannica (EB) and other unknown sources.
The front page of the jw website currently quotes from the EB suggesting that the name Easter comes from the goddess Eostre (according to Venerable Bede). It then quotes an unidentified source suggesting an alternative "pagan" origin linked to Astarte.
A quick online search identifies this second source as Alexander Hislop, in his book "The Two Babylons", and that his ideas are not supported by the majority of scholars.
The JW article then goes on to say that customs around Easter are pagan too.
If you take the time to read the EB quote, the article goes on to say that the idea that Easter and Christmas is pagan is a "dubious presumption".
Regarding the name Easter it states:
"There is now widespread consensus that the word derives from the Christian designation of Easter week as in albis, a Latin phrase that was understood as the plural of alba (“dawn”) and became eostarum in Old High German, the precursor of the modern German and English term."
So is Easter pagan? I don't know (some sources do say that), but I do know that to suggest the EB supports that view is wrong and seemingly dishonest.
Note to WT writers: please remove this misquote