Technically Easter was a pagan spring/fertility holiday long before Christians came along and hijacked it, probably because they realised the peasants would celebrate something no matter what they did.
I somehow doubt eggs and bunnies had a lot to do with some dude getting killed, unless it was the bunny from the Holy Grail.
If you’re Christian however, which according to the Census poll something like 51% of NZers are (I saw it on TV tonight) Easter is when Jesus Christ died on the Cross, (nailed by the WRIST not the PALM - the wrist was originally called part of the hand - the nail would pull right out through the fingers if nailed in the palm. And some texts say he may have merely been tied) on Good Friday, then three days later on Easter Sunday (yes, three) he rises from the dead in a not-zombie-at-all fashion. Sometimes this is celebrated on the Saturday night (for brevity, I assume.)
Nowadays, it’s basically a consumer culture chocaholic indulgence. With chocolate and marshmallows and chocolate and other sweet things and chocolate too.