Tuesday

On this day:

Robin at the Carpenter's Shop does not buy or sell on Tuesdays, although you can still enter the building.

Marnie at the Marnie's Ranch does not buy or sell on Tuesdays, although you can still enter the building.

Sandy at the Oasis sells Cactus Fruit for 150g.

Krobus in the sewers sells a single Omni Geode for a cheap 300g.