World Time Guides
50 original guides on DST, UTC, IANA zones, regional time zones, finance, legal deadlines, travel, and more.
50 guides
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Africa Time Zones Guide
Major IANA zones from Cairo to Nairobi, DST quirks, and cross-border scheduling.
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Southeast Asia Time Zones
ASEAN hubs — Thailand, Vietnam, Singapore, Malaysia, Philippines — offsets and no DST.
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Indonesia's Three Time Zones
WIB, WITA, WIT (UTC+7 to +9) — Jakarta vs Bali and scheduling across the archipelago.
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Mexico Time Zones Guide
Four Mexican zones, post-2022 DST changes, and US–Mexico border scheduling.
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New Zealand Time Zone Guide
NZST/NZDT, Chatham Islands UTC+12:45, and offsets vs Australia and Fiji.
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Pacific Islands Time Zones
Fiji, Samoa, Tonga, Guam — date line complexity and DST rule changes.
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Legal Deadlines Across Time Zones
Contracts, filings, customs cutoffs — how to write enforceable cross-border deadlines.
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Phone and Computer Time Zone Settings
How auto time zone works on iOS, Android, Windows, macOS — and travel glitches.
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Global Live Events and Launch Times
Product launches, sports, webinars — how to publish multi-zone times for worldwide audiences.
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Worldwide Daylight Saving Abolition Trends
EU, US, Turkey, Russia, Mexico — who dropped DST and what it means for scheduling.