Ash Wednesday is a holy day of prayer and fasting in many Western Christian denominations. It is preceded by Shrove Tuesday and marks the first day of Lent, the six weeks of penitence before Easter.
A cross marked in ash on a worshipper's forehead
Jesus Tempted in the Wilderness (Jésus tenté dans le désert), James Tissot, Brooklyn Museum
A priest blesses ashes
A priest marks a cross of ashes on a worshipper's forehead, the prevailing form in English-speaking countries.
Shrove Tuesday is the final day of Shrovetide, marking the end of pre-Lent. Lent begins the following day with Ash Wednesday. Shrove Tuesday is observed in many Christian countries through participating in confession; the ritual burning of the previous year's Holy Week palms; finalizing one's Lenten sacrifice; as well as eating pancakes and other sweets.
Pieter Bruegel the Elder: The Fight Between Carnival and Lent (detail), 1559
Russian artist Boris Kustodiev's Maslenitsa (1916)
Shrove Tuesday, Bear guiding [pl] in Poland (1950)
On Shrove Tuesday, many Christians confess their sins, in preparation for Lent; depicted is an Evangelical Lutheran confessional in Luther Church (Helsinki, Finland)