[day10]

Interesting link. In the section that title "A More Complete Analysis it says:

"The Season of Lent was instituted in the 4th century as a period of fasting and repentance in preparation for Easter."

I am just curious as to who instituted this?

[Nathan Zachary]

Read on, LoL! Obviously, in the 4 century the Church was Christ's gospel. Churches didn't split into all the various denominations we see today until much later. There were only the churches mentioned in Johns(?) letters to the churches, and all did the same thing.
Easter of course is remembrance of Christ's crucification, it wasn't "brought in" by anyone, it was there from the beginning.