Asia/Gaza
Date: 2038-09-24
Shift: +03:00 → +02:00 (EET)
Effect: overlap
Every time zone change, ever made, explained.
The IANA time zone database (tzdb) records every civil offset and daylight-saving transition across the globe. Explore 230+ years of timekeeping history across 598 regions and 249 countries.
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Current tzdb release: 2026d
Total tracked regions: 598 time zones
Total historical transitions: 40,234 documented changes since 1800
Most recent scheduled change: Asia/Gaza (2038-09-24)
Animated World UTC Offset Map
Scrub through history to observe the spread of standard time from the 1880s, the introduction of wartime daylight saving, and post-Soviet republic realignments.
Year 2026
1883 1916 1942 1974 1991 2011
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Recent Time Zone Changes (Last 5 Years)
Asia/Hebron
Date: 2038-09-24
Shift: +03:00 → +02:00 (EET)
Effect: overlap
America/Adak
Date: 2037-11-01
Shift: -09:00 → -10:00 (HST)
Effect: overlap
America/Atka
Date: 2037-11-01
Shift: -09:00 → -10:00 (HST)
Effect: overlap
US/Aleutian
Date: 2037-11-01
Shift: -09:00 → -10:00 (HST)
Effect: overlap
America/Anchorage
Date: 2037-11-01
Shift: -08:00 → -09:00 (AKST)
Effect: overlap
America/Juneau
Date: 2037-11-01
Shift: -08:00 → -09:00 (AKST)
Effect: overlap
America/Metlakatla
Date: 2037-11-01
Shift: -08:00 → -09:00 (AKST)
Effect: overlap
Explore Time Zone Records
Time Zones Directory
Browse all 598 canonical zones and aliases with step charts, maintainer notes, and full transition records.
Countries & Territories
DST adoption timelines, abolition dates, and zone mappings for 249 countries.
Year-by-Year History
Inspect transitions and release notes year by year from 1800 to present.
Rankings & Curiosities
Most volatile regions, skipped calendar days (Samoa 2011, Kwajalein 1993), and non-hour offsets.
Time Calculator & Gap Resolver
Determine exact historical offsets with explicit spring-forward gap and fall-back overlap detection.
Maintainer Commentary
Search historical quotes and geopolitical rationales extracted directly from tzdb source comments.