Meatfare Sunday, or "The Sunday of the Last Judgment), is traditionally the last day of eating meat before Easter for Orthodox Christians.
Why is it important?
Orthodox Meatfare Sunday is observed by Orthodox Christians on the third Sunday as defined by the Lenten Triodion, the liturgical book used in the services of Great Lent. It is the Sunday after the Sunday of the Prodigal Son and Sunday before Forgiveness Sunday. This is the third week of the pre-Lenten start of the Easter cycle of worship in the Orthodox Church.
For millions of Orthodox Christians worldwide — it's the last day they can eat meat until 'Pascha' or Easter, but still eat dairy products and eggs till the start of Great Lent.
What follows after this Sunday is several weeks of prayer and community, of forgiveness and seeking it. Orthodox Christians believe prayer, service to others, and shedding the self bring you closer to God.