Timezone Converter

About this tool

Cambodia runs on Indochina Time (ICT), which is UTC+7 all year: the country does not observe daylight saving, so the gap to anywhere else changes only when the other side moves its clocks. The recurring surprise: the offset looks permanent until London or New York shifts to summer time, and a meeting planned months ago drifts an hour. The gaps that matter to Cambodian schedules: Bangkok and Hanoi share UTC+7 and never shift; Singapore and Hong Kong are UTC+8 (one hour ahead of Cambodia) all year; Tokyo is UTC+9; Dubai is UTC+4; Sydney is UTC+10 and moves to UTC+11 during its daylight saving (roughly early October to early April); New York and Los Angeles are UTC-5 and UTC-8, moving to UTC-4 and UTC-7 while US daylight saving runs (mid-March to early November); London is UTC+0 and UTC+1 during British Summer Time (late March to late October); Paris and the CET region are UTC+1 and UTC+2 on the same European schedule. Every figure above changes only when that region shifts its clocks; Cambodia's never does. This converter shows the current moment in two zones side by side from a fixed list of twelve: Phnom Penh, Bangkok, Singapore, Tokyo, Shanghai, Dubai, London, Paris, New York, Los Angeles, Sydney and UTC. A correct time still lands in an empty room if Cambodia is on holiday that week — check the Cambodia holidays calendar and the working days calculator before you commit to a date.

How it works

Both clocks run from your device's clock: the page takes a fresh reading every second and formats it for each selected zone with the browser's Intl.DateTimeFormat using IANA zone names (format-date-time-khmer.ts: formatDateTime). The zone rules come from the tz database shipped with the browser or operating system, so when a zone that observes daylight saving is in its summer period, the displayed time and offset already reflect it — including the other side's shift, because Cambodia itself never moves. The zone list is fixed: twelve entries in COMMON_TIMEZONES (timezone-converter-client.tsx) covering the markets Cambodians coordinate with most. The chosen pair is written into the URL (from and target), so a link can be shared or bookmarked already set to two zones. The 12/24-hour toggle changes display only. Load Sample sets Phnom Penh to UTC. Because the source is the device clock, this is not a server-synced reference: if your device clock is wrong, every converted time is wrong by the same amount.

Use cases

• A Phnom Penh product team checking the current ICT and Sydney times before finding a shared working window with an Australian colleague.
• A garment buyer in New York checking the current gap to Phnom Penh factories before placing a call, and re-checking after US daylight saving ends in November.
• A remote worker checking the current Paris and Phnom Penh clocks before calling a European client during their workday.
• A Cambodian student comparing the current London and Phnom Penh times before emailing a UK university contact.
• A travel agent checking the current Dubai and Phnom Penh times while talking through a Europe itinerary with a family.
• A Phnom Penh developer sharing a converter link with two zones preselected so colleagues can compare their live clocks.
• An event organiser comparing the current Phnom Penh and Sydney times with an Australian webinar presenter; a separate Cambodia holidays calendar can check the proposed date.

Frequently asked questions

• Does Cambodia use daylight saving time?

  No. Cambodia uses Indochina Time (ICT), UTC+7, all year and does not observe daylight saving. The gap between Cambodia and another place changes only when that place shifts to or from its own summer time — which is why a difference you checked in January can be one hour larger or smaller in July.

• Why did the time difference to London change twice this year?

  Because London moves, not Cambodia. The United Kingdom switches to British Summer Time (UTC+1) on the last Sunday in March and back to UTC+0 on the last Sunday in October, while Cambodia stays on UTC+7 throughout. The gap is therefore seven hours during British Summer Time and six hours for the rest of the year.

• Which zones does the converter support?

  A fixed list of twelve IANA zones: Phnom Penh, Bangkok, Singapore, Tokyo, Shanghai, Dubai, London, Paris, New York, Los Angeles, Sydney and UTC. There is no search field and no way to add a zone — if the city you need is not on the list, the converter cannot display it.

• Can I convert a specific date and time in the future?

  No. This converter shows the current moment in two zones simultaneously and has no date picker, so it cannot tell you what time a meeting on a future date will be. Use the current gap as a starting point, then adjust for any daylight saving change that falls before the meeting date.

• Is the displayed time accurate enough to schedule a call?

  The clocks are formatted from your device clock through the browser's timezone data and update every second, which is accurate for normal scheduling. It is not a server-synced reference clock: if your device clock is wrong, every converted time is wrong by the same amount, so check your device time first.

• Is this the official time in Cambodia?

  No. The page formats your device clock using the browser's built-in timezone database; it is not an official time service and it does not query a time server. For contracts, filings or broadcast deadlines, compare against an authoritative time source rather than this page.

• What is the difference between this tool and the world clock?

  The converter answers "what time is it in X when it is Y here" for any pair from its twelve-zone list, and the pair can be shared through the URL. The world clock answers "what time is it right now in these places" for ten fixed cities at a glance, with no selection and no sharing.

Data and accuracy

Content last reviewed 21 October 2026