We all celebrate Christmas on December 25th even though that date isn't in the Bible; the Catholic Church teaches us that this the day that the Messiah was born.
We don't celebrate Easter the day after Passover (which is when the Bible tells us the first Easter Sunday was); we celebrate it on the first Sunday that follows the first full moon after the vernal equinox, because this is the day the Catholic Church declares Easter Sunday to be.
We don't take our day of rest on the Jewish Sabbath (which was the day of rest in the Bible); we take it on Sunday, because the Catholic Church has moved it to Sunday (and declared it so at the Council of Laodicea in 360).
(If you're taking your day of rest on Sunday, you're doing this without any biblical basis. In fact, you're following a Catholic practice of using either Sacred Tradition as your source.)
If only it were true, Captain.
You are bragging that the RCC is not “handcuffed to the Bible”?? And then you brag about WHY you celebrate Christmas and Easter when you do? Because “THAT’S WHAT THE CATHOLIC CHURCH TEACHES!?? And THAT my friend is exactly WHY the RCC is the queen of apostacy. Traditions and Doctrines of men. NOT biblically based. Founded on paganism and sustained by those who will not STUDY their Bible (2 Tim.2:15), but choose instead to read a view verses here and there while DEPENDING ON THEIR CHURCH to give them their man made “ meaning” of what the scriptures say.
THIS is how you end up with the False Prophet as your current pope.
Please STUDY 2nd Timothy, the whole letter. It was written for just these times.
Vernal equinox, eh?
When do the Jews say Passover is each year?