Stumped by the Puzzle? Unlocking the Mystery of ‘1300’!

In the crossword puzzle, the clue “1300 is ONEPM” is referring to the conversion of time from military (24-hour) format to standard (12-hour) format. In military time, 1300 represents 1:00 pm. This conversion is done by subtracting 12 from any time after 12:00 pm, so 1300 minus 1200 gives us 1:00 pm. Therefore, the answer to the crossword question is “ONEPM“.