A historical guide to civil time

Civil Time Atlas

Explore how civil time changed in places around the world. Each page preserves a historically distinct IANA zone, including records that share modern rules but once followed different local time.

418 historically distinct zones are generated from zone.tab and backzone. Legacy names without their own historical record redirect to their canonical zone.

Start exploring

Selected places

America/New_York
Eastern (most areas)
Asia/Kathmandu
Europe/Amsterdam
Europe/Berlin
most of Germany
Pacific/Apia

Browse the country and territory directory, explore recurring clock rules, or use the sitemap to discover every supported zone.