Are Hong Kong and Singapore in the same time zone?

Yes. The clocks in Hong Kong and Singapore always match. Not approximately, not seasonally. Identical.

Hong Kong Standard Time (HKT) and Singapore Standard Time (SST) both sit at UTC+8. Every second of every day, the two cities show the same hour and minute. On 15 January 2026 the difference is zero. On 15 July 2026 it is zero again.

Why Hong Kong and Singapore never change their clocks

Neither city observes daylight saving time. Hong Kong abandoned DST in 1979 after trials stretching back to 1946. The government cited minimal energy savings at Hong Kong’s latitude, public confusion, and disruption to business with Asian neighbours who did not change their clocks. Singapore has never observed DST.

Most travellers from Europe or the Americas expect at least one of them to switch seasonally. Neither does. The London, Hong Kong gap shifts by an hour in summer, but the change is entirely on London’s side.

How to schedule a call between Hong Kong and Singapore

Book any slot between 09:00 and 18:00 HKT. That is the whole strategy.

The Hong Kong stock exchange opens at 09:30 HKT. Singapore’s market opens at 09:00 SST. By the time both are running, teams in either city can work side by side without calculating an overlap window. Skip the time zone converter. It will only tell you the difference is zero.

If you need a joint deadline, set it in HKT or SST. The result is the same.

Separate IANA zones, same clock

Despite the identical offset, the two cities use different IANA time zone identifiers: Asia/Hong_Kong and Asia/Singapore. This matters for programmers and system administrators configuring servers or scheduling software. For everyone else, the two zones produce the same local time. Use whichever matches the city you are operating in.

What time is it in Singapore if it’s noon in Hong Kong?

Noon.

Check a clock in one city, and you have the time in the other. If you are standing in Hong Kong and need to know whether Singapore offices are open, look at your own watch. No arithmetic required.