do you think our angel would use American or international date format? I'm convinced there must be a clue in the Roman numerals, the only question is whether she would use

IV XX MM - II VIII MMXX
or
XX IV MM - VIII II MMXX

there could be clues elsewhere, of course.
she lived 19 years, 9 months, 19 days, or 7233 days
or 173529 hours
or 10415520 minutes
or 624931200 seconds.

these are approximations of course, but a good place to start unless someone out there knows what time of day she was born and what time of day she died.