What are the doomsday dates for March, and the handy "March 0"?

March's doomsday is Pi Day, 3/14 — and "March 0" (the day before 3/1, i.e. the last day of February) is also the doomsday.

• 3/14 — "Pi Day," easy to remember.
• "March 0" = the last day of February, so February and March share the same doomsday anchor.

Using "March 0" links Feb and March: whatever weekday the last day of February is, that's the doomsday, and March 14 confirms it.