Sundays are included in Lent. I asked our parish deacon about this a few years back because a religion teacher told the class that Sunday’s do not count. I knew this was wrong. Here is a post from a CAF apologist as well.
Here is the timeline for Lent:
Feb 27, '09, 11:50 am
Michelle Arnold
Catholic Answers Apologist
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Join Date: May 3, 2004
Location: San Diego, CA
Posts: 4,943
Religion: Catholic
Re: Is Holy Week still part of Lent?
The Sundays of Lent are part of Lent – which is why you hear “The First Sunday of Lent,” “The Second Sunday of Lent,” etc., at Mass on each of the Sundays of Lent. Lent ends when the Mass of the Lord’s Supper on Holy Thursday evening begins. At that time starts the Triduum of Holy Thursday, Good Friday, and Holy Saturday. The Triduum is a liturgical season in and of itself and is the shortest of the liturgical year.