What is an MCAL file? An MCAL file contains a calendar used by Monika After Story, a fan-made project about a character named Monika that is based on the Doki Doki Literature Club! visual Anime novel. It stores information about various special dates referenced in the game, such as holidays, anniversaries, Monika's birthday, and the player's birthday after Monika asks the player.

More Information You will most likely only encounter an MCAL file if you play Monika After Story and are exploring the game installation directory. The file can be found in the following directory: %appdata%\​RenPy\​Monika After Story\​ MCAL files are not meant to be manually opened. Instead, they are referenced by Monika After Story to load the dates in the game.