Evidence? Link?
Try this one: https://www.timeanddate.com/holidays/common/easter-sunday
Easter wasn’t a holiday until Constantine declared in 326 c.e. the day is celebrated differently between Eastern Orthodox and Catholic depending on the Gregorian or Julian Calendar. It was declared a holiday because the Last Supper was a Passover Seder and He was presented as a Passover Lamb Sacrifice. Since that time, however, many other doctrines crept into the Symbology, which is Resurrection, new life, a new beginning, etc. To this day, however, Easter has little to do with Passover. Passover is always the same day, always on the 15th of Nissan, always a full moon. They needed the full moon to escape Egypt through the desert and it took the length of Passover(8 days) to get to the reed sea.