The reason that I'm asking this is to create myself an invasion timer to track:
Where the current invasion is located
When the current invasion ends
When the next invasion starts
Where the next invasion locates (if possible, as I'm guessing that location is selected randomly, but sequentially)
Unfortunately, I could've not found anything related to Legion Invasion from WoW UI Source, XML archive or wowpedia.
(There was only C_Garrison.IsInvasionAvailable, which seems to return boolean value for Garrison Invasion in WoD)
So, could I get some any advice on how I could achieve those four features?