User blog comment:Quiksilvr/The date-time synchronisation error and what you can do about it/@comment-27945602-20160626064049

I have no idea whether this is stil available but looks like yes. You can't shorten the actual waiting time. What you can do is tricking the app to think that you have waited the same amount of time between the one upgrade (which you did on online) and other upgrade (that you did on offline) the app thinks the latter upgrade have waited the same time as first upgrade.

The more powerful bug(you can skip entire waiting time with by one watching) is available so this old method is not appealing. And personally I can't find the reason to shorten the time. I prefer upgrading the whole in advance.