How many letters does the top answer for “of or pertaining to a calendar.” have?

The most common answer is calendric (9 letters).

Crossword clue: of or pertaining to a calendar.

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

calendric 9 letters web-def

relating to or characteristic of or used in a calendar or time measurement

calendrical 11 letters web-def

relating to or characteristic of or used in a calendar or time measurement

of or pertaining to the calendar or a calendar. 100% similar → calendarial