The Roman numeral system is additive and subtractive. Here is the quick cheat sheet for the symbols used in your sequence:
While "25, 25, 13, 14" doesn't form a standard calendar date (as there is no 25th month), sequences like this are frequently used in: Cipher puzzles or escape room clues. Specific serial numbers for vintage machinery. Xxv Xxv Xiii Xiv Roman Numerals Translation - Google
When a smaller numeral appears after a larger one, you add them (like XIII = 10 + 3). When a smaller numeral appears before a larger one, you subtract it (like XIV = 10 + 4). Common Uses for This Sequence The Roman numeral system is additive and subtractive
To understand how we get these numbers, we have to look at each Roman numeral group individually: XXV: X (10) + X (10) + V (5) = 25 XXV: X (10) + X (10) + V (5) = 25 XIII: X (10) + I (1) + I (1) + I (1) = 13 XIV: X (10) + [V (5) - I (1)] = 14 Understanding the Rules of Translation When a smaller numeral appears after a larger
Bible verse references (though usually formatted with colons).
Are you trying to decode this sequence as a or part of a puzzle ?