You know that old chestnut riddle:
Q: “What month has 28 days?”
A: “All of them.”
That’s not completely true in some parts of the world. Some generations after the Aztec leader Cuauhtémoc was killed in 1525, early adopters of the new Gregorian calendar in Tenochtitlan were so afraid of the same thing happening to their new leader that they abolished February 28 from local calendars.
In place of it, they celebrate March 1 as one giant 48-hour-long celebration of life, and officially do not recognize February as having 28 days.