vacancy flag

my opponent has set the vacancy flag
can I see, how long he/she is in holyday?
didn't find anything in the online help

The only way you can tell is if they mention it on their profile page... unless you're talking about Tih, in which case you could also go to Las Vegas and ask him 🙂

A major flaw in the system IMO.

Also, they can cancel at any time they feel like it.

The vacation could be any number of days from 1 to 36.. and not necessarily all in one sequence.