In most cities, the weather is an inconvenience. In Hong Kong, it can change whether a day legally counts as a working day.
When Tropical Cyclone Warning Signal No. 8 (T8) goes up, the city shifts into a different gear: courts close, government offices shut, and most private employers send staff home. A Black Rainstorm Warning before office hours triggers the same effect. For anyone counting working days toward a deadline, that lost day is not just an annoyance — it changes the arithmetic.
What happens when Signal 8 goes up
Courts and tribunals
The Judiciary runs on a precise set of timing rules that depend on when the signal is lowered:
| Signal lowered/cancelled | Court action |
|---|---|
| At or before 6:00 am | Courts resume at usual morning time |
| Between 6:00 am and 11:00 am | Courts resume at 2:30 pm |
| After 11:00 am | Hearings adjourned for the whole day; attend 9:30 am next working day |
When a Pre-No. 8 Special Announcement is issued between 6:00 am and 8:45 am, morning hearings are adjourned until further notice.
Electronic filings submitted via iCMS during a registry closure are deemed received when the registry reopens — which can shift the effective filing timestamp for time-sensitive steps.
Government offices
Government offices close when T8 is in force. Non-essential staff are not required to report, and if the signal is lowered less than 3 hours before the end of working hours, they still do not need to come in.
Private sector
No law requires private employers to close during T8 — but the Labour Department's Code of Practice in Times of Adverse Weather and "Extreme Conditions" sets strong expectations:
- Employers should make prior work arrangements covering reporting, release, resumption, and wages
- Only staff whose services are absolutely essential should be required to work
- Employee safety must be prioritised
Black Rainstorm Warning: timing is everything
The Black Rainstorm Warning's impact depends entirely on when it is issued — and this catches people out:
Issued before office hours (6:00–9:00 am):
- Employers should not require employees to report unless prior agreement exists
- Court registries and offices close
- Practical effect is the same as T8
Issued during office hours:
- Indoor employees continue working as usual
- Outdoor employees suspend duties and take shelter
- Court registries and offices stay open
The same warning signal, a few hours apart, produces completely different results for deadline calculations. A Black Rainstorm at 7 am closes the courts; the same warning at 10 am does not.
Wages: what employers can and cannot do
- Employers are strongly advised not to deduct wages for absence or lateness caused by inclement weather
- It is unlawful under the Employment Ordinance to reduce annual leave, statutory holidays, or rest days to compensate for lost working hours during T8
- Under the Employees' Compensation Ordinance, employers are liable for compensation for injuries or deaths during commuting within 4 hours before or after working hours when T8 or Red/Black Rainstorm Warning is in effect
There is no law mandating full pay for typhoon days — this is handled through prior work arrangements.
The split: which deadlines care about the weather
In conveyancing and some commercial contracts, the definition of "working day" explicitly excludes T8 days and pre-office-hours Black Rainstorm days. A typhoon during a working-day countdown pauses the clock.
But calendar-day deadlines — employment notice, stamp duty, MPF — keep running regardless of weather. The clock does not pause for typhoons.
| Deadline type | T8 day excluded? |
|---|---|
| Conveyancing working days | Yes |
| Court filing steps | Operationally affected if the registry is closed |
| Employment notice (Cap. 57) | No (calendar days) |
| Stamp duty (Cap. 117) | No (calendar days) |
| MPF (Cap. 485) | Contribution day shifts to next business day |
Planning for typhoon season (June–October)
Peak activity falls in August and September, but signals can be raised any time from June to October. For deadlines in this window:
- Build in a 1–2 day buffer where the deadline type allows it
- Confirm whether the governing rule treats T8 days as non-working
- If the deadline runs in calendar days, weather does not affect the count — but it may affect your ability to act on the deadline day
- Monitor the Hong Kong Observatory for tropical cyclone updates during critical periods
Where the calculator helps
The HK calculator uses the gazetted holiday list for working-day counts. It does not predict future typhoon closures — treat adverse weather as a real-time operational check on top of the baseline count.
For calculator details, see the Info Guide.
