2019 - Start with the year. The reason for this becomes clear later, when you try to sort your files. They used a two-digit year. Four-digit is better, if you might be using dates from more than one century.
04 - Next is the month.
07 - Day
0857 - military time.
8:57 AM on April 7, 2019 becomes 201904070857. You can insert spaces and punctuation marks to make it more visually appealing. If you need to be more precise, you can add two digits to the end for seconds.
Cool. Sounds like a fun project. I used to live to do parsing ages ago and loved it. I’ll give it a try after church.