Make Up Your Own Holiday Day takes place on March 26, 2021. Now it's your turn: Make Your Own Holiday Day allows you to make today a special holiday for anything you want. Holidays are designated as having special significance for which individuals, a government, or a religious group have deemed that observance is warranted.
Unofficial holidays are holidays that are not traditionally marked on calendars. These holidays are celebrated by various groups and individuals. Some promote a cause, others recognize historical events not officially recognized, and others are "funny" holidays celebrated with humorous intent. (With material from: Wikipedia)