Well, it probably means that you cannot start two games at the same time. I think I will have to ask Wagner for his permission to send challenge at some other time.
Hello kecal (and demars),
Sorry for delay, I haven't had time to visit BB daily recently.
Yes I´ve heard this can be an issue that 2 Pickup matches may not be able to be played at the same time (or even starting very close time to each other - I've had this similar kind of issue myself that demars described - not in HGL though - and I think I just needed to change starting times of matches, and when it wasn't overlapping some other "time slot", it finally succeeded.
We had a bit of a similar situation on Season 2, as one game in which Swan River Serpents (as one team played) was organized a bit off (it was either 5 minutes of 55 minutes off, if my memory serves me) by purpose, because there was some problem.
So yes, you can try to organize the game at 3.35PM, or 3.25PM EET DST.
If neither of those work, you can progress altering the time so that it's maximum of 1 hour off from the official match time (as that's "traditionally" been the maximum off-limit time in HGL that has been accepted for exceptional cases, and it should be enough anyway to make match organizing possible).