[1] Historically Lutheran countries such as Denmark mark Quinquagesima Sunday as the peak of the Fastelavn.

[1] After attending the Divine Service on Shrove Sunday, congregants enjoy Shrovetide buns (fastelavnsboller).

The name Estomihi is derived from the incipit or opening words of the Introit for the Sunday, Esto mihi in Deum protectorem, et in locum refugii, ut salvum me facias, ("Be Thou unto me a God, a Protector, and a place of refuge, to save me") Psalms 31:3[2] The earliest Quinquagesima Sunday can occur is February 1 and the latest is March 7.

In traditional lectionaries, the Sunday concentrates on Luke 18:31–43, "Jesus took the twelve aside and said, 'Lo, we go to Jerusalem, and everything written by the prophets about the Son of Man shall be fulfilled' ...

[4] In this latter calendar it is part of the period of Ordinary Time that falls between the feasts of the Presentation of Christ in the Temple (the end of the Epiphany season) and Ash Wednesday.

The latter name comes because this Sunday concludes Maslenitsa, the week in which butter and cheese may be eaten, which are prohibited during Great Lent.

On this day, the Eastern Orthodox Church Christians at the liturgy listen to the Gospel speaking of forgiveness of sins, fasting, and the gathering of treasures in heaven.