Well I am not an expert in reg ex.
But I would set soming like
(anything followed by 2 numbers with exact expression "-04-" followed by 4 numbers followed by anything) or (anything followed by 4 numbers with exact expression "-04-" followed by 2 numbers followed by anything)

my tentative:
[0-9][0-9]-04-[0-9][0-9][0-9][0-9]|[0-9][0-9][0-9][0-9]-04-[0-9][0-9]

Not sure this makes sence.
Note: this is my first tentative for a regex expressoion 😯

Br
Jf