Check retainer hire date?

Hi there,

Is there a way to check when you hired each retainer?
Checked Mogstation but can't find it. Retainer Vocate also nothing.

Reason is to see which is/are 1.0, i've got a few extra hired and switched order for some in the past. With a serverhop i need to clear the 1.0 one(s)

I'm not aware of a way to see when a specific retainer was hired. You may need to open a ticket with GMs to get an answer (and be persistent when you get the usual copy pasta initial replies).