I use simbrief all the time for pmdg and the time is not important at all, weights yes if I want to import these direct to FMC, but time doesnt matter
but now I understand that it is used as you say in VDGS equipped gate,, so yeah fine
so looks like I have to just set time to 23:59 "something like that" then I can start at whatever time I want inside the sim, so only problem is if I happen to be in a VDGS gate it won't show countdown well I guess i have to live with that.
I am yet to be in a VDGS gate and probably I have to set them up first, as in setting up parking sport, it's not like they are just going to be there magically.