ELI5 Easter - why the bunny and chocolate eggs?

How is the date for Easter determined each year? Why do we have an Easter bunny and chocolate Easter eggs? Why did Christmas become a bigger holiday than Easter? What animal is often used instead of a bunny in Australia? ... we explain like I'm five Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: nehala, nomocactusnames, vorengard, marcvanh, euthy, deadmanv5, juanpablo2016, override9636, underbuster and kouhoutek. To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter: https://www.twitter.com/eli5ThePodcast/ or send us an e-mail: ELI5ThePodcast@gmail.com