What is the time difference between Tokyo and St John's?

St John's is 11 hours 30 minutes 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 St John's from Tokyo?

There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.

Does Tokyo observe daylight saving time?

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

Does St John's observe daylight saving time?

Yes. St John's runs on UTC-3:30 in winter and UTC-2:30 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.

If it is midday in Tokyo, what time is it in St John's?

It is 00:30 in St John's, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do Tokyo and St John's use?

Tokyo uses Asia/Tokyo, currently UTC+9, and St John's uses America/St_Johns, currently UTC-2:30. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Tokyo time to St John's time

St John's is 11 hours 30 minutes behind Tokyo right now, so midday in Tokyo lands in the small hours in St John's.

Convert a time

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Date

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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

The whole day mapped across: read down the left for Tokyo, across for St John's.

Tokyo	St John's
00:00	12:30previous day
01:00	13:30previous day
02:00	14:30previous day
03:00	15:30previous day
04:00	16:30previous day
05:00	17:30previous day
06:00	18:30previous day
07:00	19:30previous day
08:00	20:30previous day
09:00	21:30previous day
10:00	22:30previous day
11:00	23:30previous day
12:00	00:30
13:00	01:30
14:00	02:30
15:00	03:30
16:00	04:30
17:00	05:30
18:00	06:30
19:00	07:30
20:00	08:30
21:00	09:30
22:00	10:30
23:00	11:30

Daylight saving time

Tokyo keeps one offset all year while St John's moves twice. That is the whole reason this difference is seasonal.

Tokyo

Does not observe daylight saving time

Standard: UTC+9

St John's

Observes daylight saving time

Standard: UTC-3:30
Daylight: UTC-2:30
Next change: 2026-11-01 −60m

When you can actually talk

There is no hour where both cities are inside a 09:00–18:00 working day. Someone has to move — the nearest workable windows are below.

Tokyo 09:00–18:00St John's 21:30–06:30
Tokyo 20:30–05:30St John's 09:00–18:00

Reference

The zone identifiers and offsets behind everything above.

	Tokyo	St John's
IANA zone	Asia/Tokyo	America/St_Johns
Abbreviation	UTC+9	UTC-2:30
Standard offset	UTC+9	UTC-3:30
Daylight offset	—	UTC-2:30
Clock changes this year	0	2
Country	Japan	Canada

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

Common questions

What is the time difference between Tokyo and St John's?: St John's is 11 hours 30 minutes 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 St John's from Tokyo?: There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.
Does Tokyo observe daylight saving time?: No. Tokyo stays on UTC+9 all year, so its clocks never move.
Does St John's observe daylight saving time?: Yes. St John's runs on UTC-3:30 in winter and UTC-2:30 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.
If it is midday in Tokyo, what time is it in St John's?: It is 00:30 in St John's, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.
Which time zones do Tokyo and St John's use?: Tokyo uses Asia/Tokyo, currently UTC+9, and St John's uses America/St_Johns, currently UTC-2:30. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.