Doomsday Clock Monthly Update Log — Month-by-Month Changes

This page logs month-by-month developments affecting the Doomsday Clock through 2026: Bulletin statements, nuclear incidents, diplomatic breakdowns, and the escalation events that will shape the next official setting.

Page refreshed: April 23, 2026. For the current clock setting and the canonical 2026 analysis, see our Doomsday Clock 2026 current status page.

Recent Developments

For the most significant geopolitical event currently affecting nuclear risk, see our US-Iran crisis breakdown. For the complete history of every setting, see the Doomsday Clock timeline 1947–2026.

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