Zilch.
The moisture content of the door and construction is either suitable for the environment or it isn't.
Acclimatization only means any warp, if it is to occur, happens before you fit it rather than after. In fact some warp can be restrained by the hinges and locking mechanisms, so acclimatization for doors may be more than just a waste of time, but also counter-productive.
If the door is to be stored for fitting later then keep it in plastic wrapping.
If it isn't properly wrapped, and you have to store it, store it in end use conditions.
If you have to store it, then support it properly to avoid self weight causing warp.
If it isn't wrapped, and the building is still drying out or has wet trades, then the door shouldn't be on site (although with decent doors you tend to get away with such bad practice regularly).