One guy from our Polish ADOM Forum found a way to decrease number of elapsed turns tracked by the game.

You have to 'd'rop at least two different items, then repeatedly press ',' and 'space' (or 'z' - invoke the pick-up command, then cancel it). Each time a turn will be substracted from the counter (when it should be added, because you use it for looking what's on the ground).

There is no effect on the game time (in days, hours etc.), but it has an impact on the ending score.
It would be even possible to produce a winning .flg with only a few (or 0) turns on counter, multiplying the score by several times.

This has been tested on 1.1.1 Windows and Linux (Sage) versions.