Why are the Gloria and Alleluia omitted during Lent?

Quote: "The Lenten season is marked by two very distinct liturgical omissions. Neither the hymn known as the Gloria (Glory to God in the Highest) nor the Alleluia verse sung before the Gospel is permitted during the entire 40 days of Lent (with a few small exceptions)."

Read the full article here: https://aleteia.org/2019/03/01/why-are-the-gloria-and-alleluia-omitted-during-lent/