Historical Rules · 19 June 2026
Rule 502.2
Official source text from the 19 June 2026 Rules release
Second, if it’s day and the previous turn’s active player didn’t cast any spells during that turn, it becomes night. If it’s night and the previous turn’s active player cast two or more spells during that turn, it becomes day. If it’s neither day nor night, this check doesn’t happen and it remains neither. This turn-based action doesn’t use the stack. See rule 731, “Day and Night.”