Close, but you are off by a week, it ends on Trinity Sunday. And starts 4 days after Ash Wednesday.
From the Baltimore Catechism:
Q. 1353. What sin does he commit who neglects to receive Communion during the Easter time?
A. He who neglects to receive Communion during the Easter time commits a mortal sin.
Q. 1354. What is the Easter time?
A. The Easter time is, in this country, the time between the first Sunday of Lent and Trinity Sunday.
Q. 1355. When is Trinity Sunday?
A. Trinity Sunday is the Sunday after Pentecost, or eight weeks after Easter Sunday; so that there are fourteen weeks in which one may comply with the command of the Church to receive Holy Communion between the first Sunday of Lent and Trinity Sunday.