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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Middle East Time Zones Guide
Time zones, workweeks, and DST rules for the Gulf, Israel, Turkey, Iran, and the wider Middle East.
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India Time Zone (IST) Explained
Indian Standard Time UTC+5:30 nationwide, no DST, and offsets vs major world cities.
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Japan and Korea Time Zones
JST and KST (both UTC+9), no DST, and offsets vs China, the US, and Europe.
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Canada Time Zones Guide
Six Canadian zones, DST rules, half-hour Newfoundland, and Saskatchewan exceptions.
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Brazil Time Zones Guide
Brazil's four current zones, end of DST since 2019, and offsets vs neighbors.
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UK Time: GMT and BST
Greenwich Mean Time vs British Summer Time, switch dates, and offsets vs Europe and Asia.
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Time Zones in Calendar Invites
How to set multi-time-zone meetings in Google Calendar, Outlook, and Apple Calendar without confusion.
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Time Zone Abbreviation Pitfalls (EST/CST/PST)
Why EST, CST, GMT, and similar abbreviations fail in global scheduling — and what to use instead.
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Public Holidays and Time Zones
Why the same UTC instant can be a holiday in one country and a workday in another — scheduling tips.
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Forex Market Trading Hours
How the 24×5 FX market runs across Sydney, Tokyo, London, and New York sessions.