I would advise everyone to be really careful screwing around with time control. I finished most of the plot in 4 days and my 9 days resting at an inn to fast forward to day 13 has not gone well, it had the audacity to give me a game over screen instead of the mission to save vanille, curses!
Try and only do one main story completition every 2 days or so, space them out, theres like 5 for a grand total of 6 across 13 days.
I would just avoid using the day codes entirely, but the hour? go for it! For screwing around with side quests and the like, just avoid 6AM, unless you actually want to advance the day, which is vital for plot cutscenes and stuff.
Other then that, great trainer as usual! I enjoy the 1 hit ko, combat is pointless without a level up system, purely just to collect ingredients.