Lent, a period of fasting previous to Easter, at first lasting only 40 hours, was gradually extended to three, four, or six days, then different Churches extended it to three and six: weeks; in the 6th century Gregory the Great fixed it for the West at 40 days from Ash Wednesday to Easter, excluding Sundays; in the Eastern Church it begins on the Monday after quinquagesima and excludes both Saturdays and Sundays; in the Anglican Church the season is marked by special services, but the fast is not rigidly kept.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Lens * Lenthall, William