piday
- March 14, to mathematicians
- Mid-March celebration ... or a hint to the starts of 18-, 25-, 44- and 57-Across
- March 14, to math lovers
- March 14, to math fans
- When MIT mails acceptance letters
- Observance that falls on the anniversary of Einstein's birth
- Mathlete's March observance
- Math nerds' annual 3/14 celebration
- March 14th, to mathematicians
- March 14th, casually