時

时 = 寸 + 日 : Mnemonic symbol: a giant pocket watch.

The sun (日) asks Sherlock Holmes (sh) out for a coffee in the space station's kitchen (Ø2). Looking at his pocket watch (时), Sherlock sees he has time, winks and "thumbs up" (寸).

寺 = 土 + 寸 : Socrates (s) built a Buddhist temple (寺) in the space station's bathroom (Ø4). To protect it from being destroyed while floating around in zero gravity, he built a protective frame made out of mud (土) around it. After finishing it he inspects it and thinks "thumbs up" (寸), because he is proud of his work.

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).