Is it necessary to go to church on December 26? Christmas, is a religious holiday (in the Christian tradition) that commemorates the birth of Jesus Christ. This feast is celebrated on December 25 (according to the Gregorian calendar). In churches that still use the Julian calendar (e.g. Orthodox), this holiday is celebrated at a later date (January). December 26 is not a commanded holiday, and thus you do not have to go to church for Mass. In the calendar of every Catholic the Feast of the Nativity of the Lord occupies a special location. That is why the whole Christmas season is worth spending and staying in the church with its community and together with the Lord. Even 15 minutes devoted to prayer in God's House can give a lot.