since it is the last day before Lent. Lent is the season of prayer and fasting observed by the Roman Catholic Church and other Christian denominations during the forty days and seven Sundays before Easter Sunday. Easter can be on any Sunday from March 23 to April 25

since the exact day is set to coincide with the first Sunday after the full moon following the Spring Equinox. Mardi Gras occurs on any Tuesday from February 3 through March 9. The Gregorian calendar