Crossword puzzle clue "at an unknown date"

Here are the possible solutions for at an unknown date clue

Answer
Clue
Relevancy
sine
Clue
__ anno (date unknown, in bibliographies)
sometime
Clue
At an unknown date
beau
Clue
Date night date
Definition
(French) a boyfriend
stoodup
Clue
Canceled a date without telling the date
agod
Clue
Steinbeck's "To ___ Unknown"
"To ___ Unknown" (Steinbeck novel)
alg
Clue
Search for the unknown?: Abbr.
algebra
Clue
Search for the unknown?
Definition
(Arabic) a method of calculating by symbols

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