[Old Yeller]

Actually, Catholics don’t eat meat on any Friday.

I believe that was the initial rule, but then it got changed to just Lenten Fridays. They tend to change a lot of laws over time, since they are man made laws to begin with.

[nickcarraway]

I believe that was the initial rule, but then it got changed to just Lenten Fridays.

No, that's a myth. It never changed. There's just an option to give up something else, instead. There were always exceptions. For example, soldiers were allowed to eat meat, if necessary.