stonebro: I'll test it myself before I believe it. Just seems off that Blizzard would be dumb enough to implement an activation scheme that can be beat simply by changing your windows date.
COPY AND PASTE of what I answered in another thread (guess I will continue in this one...)
Well in offline mode they have no way to know which time it really is...
I haven't tried that yet but I guess that there is probably anti-"time travel backward" mechanism, So if you play the game the 2nd august at 8PM and suddenly start the game the 2nd august at 4PM you will probably get the "you must reactivate" message too.
If I have time I will try that later today.
What I wonder is if there is another "hidden" time limit, for example if you must reactivate every 30 day and also reactivate every 10-20 hours or so of gameplay... I am kind of tempted to let the game run in offline mode on my laptop for 24-48 hours in a row to see if it asks me to reconnect. So even if you "tweak" your clock some day you will reach the time limit.