Easter is ar holiday that is celebrated with Easter flags on different dates yearly as it falls on the Sunday following the first full moon after the vernal equinox. Christians have been celebrating this day since the second century and no other day can match the religious importance of Easter Sunday. It is the day Jesus was resurrected and his dead body was joined with his spirit in eternal union. His resurrection marked reconciliation between God and man.
The feast was first celebrated in the second century, but didn't become official until 325AD. It was debated if Easter should be held on a weekday, like the Jewish custom of Passover or if it should be held on a Sunday. It was finally decided it should be held on the first Sunday, after the first full moon after the vernal equinox, which was later changed to March 21.
As with many other early Christian holidays the date selected was as much political as it was symbolic. The word Easter itself is believed to have come from the Anglo Saxon Goddess of Spring named Eostre, or the rising of the sun in the east. Many churches today still have early sunrise services on Easter to follow tradition.
There are many symbols associated with Easter that can be found on flags celebrating this holiday and they include Easter rabbits or bunnies, Easter Eggs, Easter lilies, objects of springtime and new clothing. Easter may have started out as a religious holiday by people fasting, sacrificing and holding prayers to remember the sacrifices Christ made, but today its true meaning is often forgotten as chocolates and candies are often the main ingredient of Easter. You can still, find some flags with religious symbols such as crosses on them.