Asia scheduling guide
Asia Time Zones
Last reviewed June 19, 2026 by TheWorldTimeMap editorial team
Asia spans a wide range of UTC offsets, and many major business locations do not use daylight saving time. That can make some offsets stable, but it also means the overlap with US and European teams changes when the other side changes clocks.
When this guide helps
Use it for APAC meetings, India-US handoffs, supply-chain calls, travel planning, support coverage, and product launches. The table gives a readable overview, while the links open live clocks, converters, and city pages for exact scheduling.
Date-sensitive caution
Short labels can be ambiguous. IST can mean India, Irish, or Israel time, and CST can mean China or Central Standard Time. Use the city or IANA zone in calendar events. For calendar invitations, include the city name, local time, and date so people and software can verify the intended offset.
Common zones and offsets
Offsets are planning references. Use the linked clock or converter with the exact date when accuracy matters.
| Zone | IANA example | Typical offset | Planning note |
|---|---|---|---|
| India Standard Time | Asia/Kolkata | UTC+5:30 | Common for India engineering, support, interviews, and outsourcing schedules. Open |
| Gulf Standard Time | Asia/Dubai | UTC+4 | Useful for Dubai, Abu Dhabi, UAE business, finance, and travel calls. Open |
| China Standard Time | Asia/Shanghai | UTC+8 | Used across mainland China and common in supply-chain planning. Open |
| Singapore Time | Asia/Singapore | UTC+8 | A stable APAC business anchor for regional meetings and trading desks. Open |
| Japan Standard Time | Asia/Tokyo | UTC+9 | Useful for Japan meetings, launches, gaming releases, and travel. Open |
| Korea Standard Time | Asia/Seoul | UTC+9 | Useful for South Korea business, releases, support, and travel. Open |
Three-step planning workflow
First, pick the real anchor city for the person or team that owns the event. A broad label such as Asia Time Zones is useful for discovery, but calendar software needs a place-based zone such as the IANA examples in the table.
Second, test the exact calendar date and at least one future date if the meeting repeats. This catches daylight-saving gaps, half-hour offsets, regional exceptions, and cases where one side changes clocks before the other side does.
Third, write the invitation with both local times, the city names, and the date. For public pages, webinars, release notes, or customer emails, include a UTC reference only when it helps technical readers verify the same instant.
Common mistakes to avoid
Do not assume that today's offset will still be correct next month. Offsets shown on search pages, dashboards, or old email threads can become stale when daylight-saving rules, regional policies, or date boundaries change.
Do not use a short abbreviation without context. Labels such as CST, IST, BST, and GST can point to different regions, and some labels only apply in standard time or daylight time. Use the abbreviation as a reader-friendly hint, not as the source of truth.
Do not force every live call into the same region's convenient hours. If the overlap is narrow, rotate the inconvenient slot, shorten the live meeting, and move routine status work into written handoffs.
Popular city clocks
Open a city page when you need the local clock, local date, and related planning links instead of a broad regional label.
Open China Standard Time, UTC+8, and US-China planning guidance.
EST to ISTConvert East Coast time to India.
PST to ISTConvert Pacific Time to India.
London to Singapore overlapPlan Europe-APAC calls.
California to India overlapPlan US Pacific and India hours.
Abbreviation guideCheck ambiguous labels such as IST and CST.
Data accuracySee how exact offsets are handled.
Data and editorial notes
The live clock links use browser-supported IANA time zones through Intl.DateTimeFormat. The written offsets are planning references, not legal time advice, because governments and regions can change daylight-saving or standard-time rules.
Read Time Zone Data And Accuracy for data handling, Editorial Policy for review standards and advertising separation, or Feedback to report a correction.
Data accuracy explains IANA time zone sources, offset limitations, daylight-saving changes, and correction handling.
Editorial policy describes review standards and keeps regional guidance separate from advertising.
Feedback is the path for reporting stale offsets, broken city links, or unclear regional examples.
Privacy policy explains advertising, consent, analytics, cookies, and local browser storage.
Asia Time Zones FAQ
Which Asia time zone is best for APAC meetings?
There is no single Asia time zone. Singapore Time and China Standard Time are common UTC+8 anchors, while India, Japan, Korea, and Gulf schedules need their own local zones.
Does Asia use daylight saving time?
Many major Asian business zones do not currently use daylight saving time, but exact scheduling should still use a city-based zone and date.
Why is IST ambiguous?
IST can mean India Standard Time, Irish Standard Time, or Israel Standard Time. Use Asia/Kolkata when you mean India.