St. Cyril and St. Methodius Day is a feast day celebrated in honor of the Apostles to the Slavs, Saints Cyril and Methodius. It commemorates their missionary work, cultural contributions and role in spreading Christianity among the Slavic peoples. This day is significant in both Catholic and Orthodox traditions, as well as in many Slavic countries.

Shrove Monday is part of the Christian pre-Lenten period known as Shrovetide. While less well-known than Shrove Tuesday, it historically held significance in certain Christian traditions, especially in Europe and the UK.

Mardi Gras Day, also known as Fat Tuesday, is a vibrant and festive celebration that takes place the day before Ash Wednesday, marking the start of Lent in the Christian calendar. It’s a day of indulgence, feasting, and revelry before the solemnity of the Lenten season.

Shrove Tuesday is the day before Ash Wednesday, marking the end of the pre-Lenten season known as Shrovetide. It is traditionally a day of feasting, confession and preparation for the 40-day Lenten season.

Ash Wednesday is a significant day in the Christian liturgical calendar, marking the beginning of Lent, a 40-day period of fasting, prayer, and repentance leading up to Easter. It is observed in Western Christianity including Catholic, Anglican, Lutheran, and some Protestant traditions.

Clean Monday is the first day of Great Lent in Eastern Orthodox Christianity. It marks the beginning of a 40-day period of fasting and repentance leading up to Easter. The day is significant for its focus on spiritual cleansing, renewal, and preparation for the resurrection of Christ.