Lent is a certain time period leading up to Easter, usually 40 days. This custom is practiced a lot by Catholics and other Christian churches but can really be a great time for all Christians to reflect on the life of Christ leading up to his death.
Here are some good links to get a better understanding of Lent:
Wikipedia Entry for Lent
This is a great overall page with a lot of general information. Good starting point.
Ash Wednesday
For most, this Wednesday (March 9) kicks of Lent with Ash Wednesday. Christians will attend church and ashes in the shape of a cross put on their forehead. This article has a nice explanation, which starts in the second paragraph.
