Time disappear! (Its actually a glitch though.)
If you don't have 60 or more sprite's then this will work. First equip the blue feather then go derectly in front of the harvest goddess spring then use the blue feather, tadda! Your time SHOULD be gone, to get it back do the same thing again with the harvest goddess sping and the blue feather.
If you need more help, we've got more Harvest Moon DS Cute cheats and also check out all of the answers for this game