-Only compatible with the GREGORIAN calendar. -Uses mm/dd/yyyy -The number of 'y's does not have to be 4. -It can be 1, 6, 293, 29993, etc. The value of y can also be negative(may not be accurate). -Should be accurate until 3200 AD -Uses Zeller's Congruence formula -With help from Google's AI Assistant for the formula and debugging ⚠Not thoroughly tested: May have mistakes.⚠ -Please double-check with an actual calculator and report any inaccuracies in the comments.
