Kitten Koder is correct. Easter was another stolen holiday of the early Christians.
Do you really think Jesus was born anywhere near December 25? The date was chosen since it was so close to Saturnalia, it had nothing to do with the actual date which was long lost.
Actually it is because of the Winter Solstice more than anything else.
Just as spring and Easter is the spring equinox.
Until the 325 Council of Nicea Easter was celebrated on the Sunday after the first full moon following the vernal equinox.
Makes you wonder why but when you look at the traditional reasons for celebration on these dates , it seems the Jesus tale was fashioned to fit with them.