末日

末 = 一 + 木 : Mnemonic symbol: a Jehovah’s Witness, because they think the end (末) is near.

Mahatma Gandhi (m) set up a giant flute (一) on a Christmas tree (木), trying to raise awareness for the Roof of the World in the observatory's bathroom (o4). He chose the flute and the tree as symbols for the sky and nature, but as Jehovah’s Witness (末) enters, she thinks it's the sky that has fallen down on our heads, and the end (末) of days is ultimately here.

日 = 囗 + 一 : Robinson Crusoe (r) is hiding from the sun (日) in an enclosure (囗) full of flutes (一) in the space station's bathroom (Ø4).