We found 2 dictionaries that define the word datemarks:

General (1 matching dictionary)

1. datemarks: Merriam-Webster

Slang (1 matching dictionary)

2. Datemarks: Urban Dictionary

(Note: See datemark as well.)

Definitions from Wiktionary (datemark) ▸ noun:  A marking that indicates a date. ▸ Also see datemark ▸ Words similar to datemarks ▸ Usage examples for datemarks ▸ Idioms related to datemarks ▸ Wikipedia articles (New!) ▸ Popular adjectives describing datemarks ▸ Words that often appear near datemarks ▸ Rhymes of datemarks ▸ Invented words related to datemarks