Easter is the most important holiday on the Christian calendar. It coincides with Passover, and occurs each year on the first Sunday following the first Full Moon after the vernal equinox. Therefore, Easter could happen on any given Sunday between March 22 and April 25 depending on the year.

The 40 days prior to Easter are called Lent. The forty days represent the time in Jesus Christ’s life spent in the wilderness before he began his public ministry, where he was tempted by the Devil. Forty days is significant in other ways, such as the forty days and forty nights of rain and flooding, for example.