The Bible does not require anyone to abstain from meat on any day. In fact, the only passages in the New Testament that talk about it are Acts 15:29 and 1 Timothy 4:3. The passage in Acts 15 says that the only parts of the Law of Moses required by the elders and apostles in the congregation in Jerusalem were prohibitions against idolatry, fornication, and eating blood and meats from strangled animals. It says nothing about abstaining on certain days. The practice of not eating meat on Fridays (all Fridays) dates back to about the fourth century. It is written in some writings of that time that it was a practice, but does not say it was a sin. Anyone who says it is a sin would have to prove it by the Bible, and the Bible says that requiring people to abstain from meat is itself a sin. Anyone who chooses not to eat meat on any particular day is within their rights to do so. Anyone who requires it of others is absolutely wrong. http://minuteswithmessiah.tripod.com/question/meatless.html
It's a man made tradition. Coming from the Catholic Religion. This is just like Christmas, and Holloween and every other man made holiday. It and they are not in the Bible. People don't even know the truth of where these traditions come from and they don't care. If you believe in the Bible and follow Bible principles. Why would you celebrate something false, man made not originating from God?