What day is today? Needless to say, if you have an old English dictionary in your hand (such as Modern Advanced English-Chinese Dictionary published by Oxford University Press 1963), you can find that the "Easter" clause in the dictionary has clearly written the relevant provisions on the date of Easter, which reads: "Easter is the earliest on March 2 1 day or after the full moon. (The original English sentence is: "Easter, the anniversary of the birth of Christ, is celebrated on the first Sunday after the full moon on or after March, 2/kloc-0." ) (Note) It turns out that Easter is merged through three calendars. No wonder it is so erratic!

According to the tradition of western churches, the first Sunday after the full moon is seen on the day of the vernal equinox (February1March, 2008) or the first full moon after the vernal equinox is Easter. The Eastern Church stipulates that if the full moon occurs on this first Sunday, Easter will be postponed for one week. So the festival is roughly between March 22nd and April 25th.