What is the time difference between Hong Kong and Tokyo?

Tokyo is 1 hour ahead of Hong Kong. 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 Tokyo from Hong Kong?

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

Does Hong Kong observe daylight saving time?

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

Does Tokyo observe daylight saving time?

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

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

It is 13:00 in Tokyo, 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 Hong Kong and Tokyo use?

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

Convert Hong Kong time to Tokyo time

Tokyo is 1 hour ahead of Hong Kong right now, so midday in Hong Kong lands in the afternoon in Tokyo.

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 Hong Kong, and what the clock reads in Tokyo at that same moment.

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

Daylight saving time

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

Hong Kong

Does not observe daylight saving time

Standard: UTC+8

Tokyo

Does not observe daylight saving time

Standard: UTC+9

When you can actually talk

The window is 8 hours wide — 09:00–17:00 in Hong Kong, 10:00–18:00 in Tokyo.

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

Reference

The zone identifiers and offsets behind everything above.

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

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

Common questions

What is the time difference between Hong Kong and Tokyo?: Tokyo is 1 hour ahead of Hong Kong. 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 Tokyo from Hong Kong?: Between 09:00–17:00 in Hong Kong, which is 10:00–18:00 in Tokyo. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Hong Kong observe daylight saving time?: No. Hong Kong stays on UTC+8 all year, so its clocks never move.
Does Tokyo observe daylight saving time?: No. Tokyo stays on UTC+9 all year, so its clocks never move.
If it is midday in Hong Kong, what time is it in Tokyo?: It is 13:00 in Tokyo, 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 Hong Kong and Tokyo use?: Hong Kong uses Asia/Hong_Kong, currently UTC+8, and Tokyo uses Asia/Tokyo, currently UTC+9. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.