Hello! I went ahead and tried. Didn't lose any villagers. Just make sure you wait until someone asks to move. Tell them no (or yes if you want to get rid of them). Save the game, and change the clock to the desired date.
Someone already offered me a mini rustoid and I don't have the dresses you mentioned. But I'd be happy to get you something else or pay you for the other gyroid.
Hi! I can't come back tonight Dx My mom is making me go shopping with her lol If you want to keep them until tomorrow, that's cool :3 But, if not, I understand n-n