From the Catechism of the Catholic Church (CCC)
Article 1: Celebrating the Church's Liturgy (1136 - 1199)
III. WHEN IS THE LITURGY CELEBRATED?
The liturgical year
1168 Beginning with the Easter Triduum as its source of light, the new age of the Resurrection fills the whole liturgical year with its brilliance. Gradually, on either side of this source, the year is transfigured by the liturgy. It really is a "year of the Lord's favor."42 The economy of salvation is at work within the framework of time, but since its fulfillment in the Passover of Jesus and the outpouring of the Holy Spirit, the culmination of history is anticipated "as a foretaste," and the kingdom of God enters into our time.
of the Roman Catholic Church
There is an appointed time for everything,
and a time for every affair under the heavens.
4 Sundays
12 days plus
34 Sundays
40 days
3 holy days = 1 liturgical celebration
7 Sundays
What does each color used at each season or feast day mean?
Sources:
Liturgical Year 2025 scroll down the webpage and click on Liturgical Year 2025 then scroll to the date and look to the right to see which color is used on that date
https://www.togetheratonealtar.catholic.edu.au/craft/liturgical-colours-and-seasons/