Ash Wednesday is always 46 days before Easter, and Fat Tuesday is always the day before Ash Wednesday. Easter can fall on any Sunday from March 23 to April 25, with the exact date to coincide with the first Sunday after the full moon following a spring equinox. But to save you some work here is when Fat Tuesday Falls for the next couple of years:
2024: February 13th
2025: March 4th
2026: February 17th
2027: February 9th
2028: February 29th
2029: February 13th
2030: March 5th
2031: February 25th
2032: February 10th
2033: March 1st
2034: February 21st
2035: February 6th
2036: February 26th
2037: February 17th
2038: March 9th
2039: February 22
2040: February 14th
2041: March 5th
2042: February 18th
2043: February 10th
2044: March 1st
2045: February 21st
2046: February 6th
2047: February 26th
2048: February 18th
2049: March 2nd
2050: February 22nd