What is the time difference between Tokyo and Hong Kong?

Hong Kong is 1 hour behind Tokyo. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.

When is the best time to call Hong Kong from Tokyo?

Between 10:00–18:00 in Tokyo, which is 09:00–17:00 in Hong Kong. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Tokyo observe daylight saving time?

No. Tokyo stays on UTC+9 all year, so its clocks never move.

Does Hong Kong observe daylight saving time?

No. Hong Kong stays on UTC+8 all year, so its clocks never move.

If it is midday in Tokyo, what time is it in Hong Kong?

It is 11:00 in Hong Kong, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.

Which time zones do Tokyo and Hong Kong use?

Tokyo uses Asia/Tokyo, currently UTC+9, and Hong Kong uses Asia/Hong_Kong, currently UTC+8. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Tokyo time to Hong Kong time

Hong Kong is 1 hour behind Tokyo right now, so midday in Tokyo lands in the morning in Hong Kong.

Convert a time

From

Date

Time

Converted time

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The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

Every hour of a day in Tokyo, and what the clock reads in Hong Kong at that same moment.

Tokyo	Hong Kong
00:00	23:00previous day
01:00	00:00
02:00	01:00
03:00	02:00
04:00	03:00
05:00	04:00
06:00	05:00
07:00	06:00
08:00	07:00
09:00	08:00
10:00	09:00
11:00	10:00
12:00	11:00
13:00	12:00
14:00	13:00
15:00	14:00
16:00	15:00
17:00	16:00
18:00	17:00
19:00	18:00
20:00	19:00
21:00	20:00
22:00	21:00
23:00	22:00

Daylight saving time

Neither Tokyo nor Hong Kong changes its clocks, so the difference between them is the same every day of the year.

Tokyo

Does not observe daylight saving time

Standard: UTC+9

Hong Kong

Does not observe daylight saving time

Standard: UTC+8

When you can actually talk

You have 8 hours of shared working time: 10:00–18:00 in Tokyo, which is 09:00–17:00 in Hong Kong.

Tokyo 10:00–18:00Hong Kong 09:00–17:00

Reference

The zone identifiers and offsets behind everything above.

	Tokyo	Hong Kong
IANA zone	Asia/Tokyo	Asia/Hong_Kong
Abbreviation	UTC+9	UTC+8
Standard offset	UTC+9	UTC+8
Daylight offset	—	—
Clock changes this year	0	0
Country	Japan	Hong Kong SAR China

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between Tokyo and Hong Kong?: Hong Kong is 1 hour behind Tokyo. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.
When is the best time to call Hong Kong from Tokyo?: Between 10:00–18:00 in Tokyo, which is 09:00–17:00 in Hong Kong. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Tokyo observe daylight saving time?: No. Tokyo stays on UTC+9 all year, so its clocks never move.
Does Hong Kong observe daylight saving time?: No. Hong Kong stays on UTC+8 all year, so its clocks never move.
If it is midday in Tokyo, what time is it in Hong Kong?: It is 11:00 in Hong Kong, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.
Which time zones do Tokyo and Hong Kong use?: Tokyo uses Asia/Tokyo, currently UTC+9, and Hong Kong uses Asia/Hong_Kong, currently UTC+8. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.