EPACT
Set to 2 different clues across 3 published puzzles, most often “Difference in days between the lunar and solar year” — The New York Times, Sunday, 26 December 2010.
5 letters
Every clue on record, most used first
- Difference in days between the lunar and solar year2 times
The New York Times — Sunday, 26 December 2010
- Astronomical differenceonce
The New York Times — Saturday, 29 September 2001