I got asked yesterday if Lent was Latin or Greek or Hebrew or what. I replied it was Middle English. It's related to our modern word "lengthen." All the name implies is that the days are getting longer. One of the interesting things about the conversion of the ancient English is how deeply Christianity penetrated the culture. Christmastide, Whitsunday, Lent, even Easter are all derived from English; they sit side by side in our consciousness with Epiphany and Pentecost.
In other news, I decided to give up giving things up for Lent.