From the source rules
Who goes first in Catch the Moon?
Thames & Kosmos English rules

Whoever most recently saw a full moon starts.
Official tie-break or fallback
If the group cannot decide, the youngest player starts.
Source & edition
- Catch the Moon: Thames & Kosmos rulesThames & Kosmos · Setup and first-player instruction; PDF pages 2 · Checked 2026-09-23Printed page references: 2Cited PDF pages: 2
Image: © Thames & Kosmos and credited artists · Noble Knight Games listing for Thames & Kosmos 2022 edition
If your rules call for a random choice, use the player picker.
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