Today is Septuagesima Sunday in the Tridentine calendar.
Septuagesima and Lent are both times of penance, Septuagesima being a time of voluntary fasting in preparation for the obligatory Great Fast of Lent. The theme is the Babylonian exile, the "mortal coil" we must endure as we await the Heavenly Jerusalem. Sobriety and somberness reign liturgically; the Alleluia and Gloria are banished
The Sundays of Septugesima are named for their distance away from Easter:
Throughout this short Season and that of Lent (next Season) you will notice a deepening sense of penance and somberness, culminating in Passiontide (the last two weeks of Lent), that will suddenly and joyously end at the Vigil of Easter on Holy Saturday when the alleluia returns and Christ's Body is restored and glorified.