1. To commemorate the day when Jesus Christ was resurrected on the third day after he was crucified on the cross between 30 and 33 AD.

2. The "Bible·New Testament" records that Jesus was crucified on the cross and resurrected on the third day, hence the name Easter. Easter is the most important festival in Christianity, more important than Christmas. The origin and festival of the religion are in Israel.

3. According to the Gospel of Matthew in the Bible, Jesus Christ was resurrected three days after his death on the cross, so this festival was established. Based on the Bible and the date of the Passover of the advanced Israelites, historians have calculated that the first Sunday after the full moon after the vernal equinox (March 21) is the day Jesus was resurrected in the Bible.

4. Since the vernal equinox is not fixed every year, the specific date of Easter every year is also uncertain. But the festival is roughly between March 22nd and April 25th.