"Working days", "calendar days" and "months" describe how dates are counted. The source of the period must also provide the trigger, the treatment of the first and last dates, any exclusions, and any rule that moves the final date.
Hong Kong rules combine these elements differently. Property stamping can use 30 calendar days, while a first-hand residential sale uses five working days with its own definition. Order 3 excludes specified days from periods of seven days or less, but not from longer periods. The wording that creates the period therefore comes first.
The sources and examples below were checked on 3 August 2026.
Start with the unit, then the four other facts
Calendar days count each date in sequence. Working days leave out the dates specified by the applicable definition. A calendar month runs between corresponding dates rather than for a fixed number of days.
Each method still needs four other facts:
| Required fact | Question answered |
|---|---|
| Trigger | Which event and date start the period? |
| Boundaries | Does the trigger date count, and is the final date included? |
| Exclusions | Which weekends, holidays, warning days, closures or vacation periods are omitted? |
| Final-day treatment | Does the result move if the required act cannot be done that day? |
The words "30 days" do not establish those facts. Employment, property and court proceedings each contain periods counted in more than one way.
Where each rule is explained
No single method covers Hong Kong's property, employment, MPF and court deadlines. The rules in each area combine the elements above differently, and each has its own guide:
- employment notice stated in months runs in calendar months from the day notice is given;
- property stamping uses 30 calendar days, with the two-agreement rule deciding which agreement supplies the date;
- MPF enrolment and monthly contributions count calendar days but move the final day under published conditions;
- a first-hand residential sale gives the purchaser five working days on a statutory definition of its own; and
- High Court and District Court periods under Order 3 change method at seven days.
The rest of this guide explains the choices behind those rules: the unit, the boundaries, what a working day means in the governing source, and the treatment of the final day.
A calendar month is different from 30 days
For an employment notice expressed in months, the Labour Department's 1823 guidance includes the day on which notice is given. The month ends at the end of the day before the corresponding date in the following month.
The published examples cover dates that do not align neatly:
- notice given on 13 February runs to the end of 12 March;
- notice given on 30 January runs to the last day of February because that month has no corresponding date; and
- notice given on the last day of February runs to 31 March.
A fixed 30-day calculation differs in many months. For notice expressed in days, the same guidance says the notice day may be excluded to avoid disputes. The unit therefore also affects the boundary treatment.
In the calculator, turn on Calendar days and select Months for a calendar-month method. Use Include start date and Include deadline date to match its boundaries.
A working-day definition belongs to its source
The first-hand residential sales period provides a concrete definition. The Sales of First-hand Residential Properties Authority states that the purchaser must execute the ASP within five working days after entering into the PASP. For that period, a working day is a day that is not:
- a general holiday;
- a Saturday;
- a black-rainstorm warning day; or
- a gale-warning day.
Sunday is covered because every Sunday is a General Holiday in Hong Kong. A different statute, court rule or contract may use another list. Some construction arrangements count Saturdays; a contract may exclude both weekend days or add an organisation shutdown.
General Holidays and Statutory Holidays are different lists. The calculator's ordinary Hong Kong calendar uses General Holidays under the General Holidays Ordinance. Statutory Holidays are employment entitlements under the Employment Ordinance. In 2026, there are 17 named General Holidays plus every Sunday, but 15 Statutory Holidays. The 2026 General Holidays guide compares them.
For an ordinary scheduled working-day calculation, use Default Mode and select the Business Context that matches the definition. A Shutdown Period should be added only where the source excludes that closure.
Court periods of seven days or less are counted differently
Order 3 rule 2 of both the Rules of the High Court and the Rules of the District Court applies a specific short-period rule. Where the period is seven days or less, it excludes Saturdays, General Holidays, gale-warning days and black-rainstorm warning days. If the act must be done at a court office, it also excludes another day on which that office is closed.
For longer periods, the short-period exclusions do not apply inside the count. If an act must be done at a court office and the calculated date is a closed day, the filing date can still move to an open day.
The distinction appears in two checked calculator examples:
- five days from Wednesday 7 January 2026 ends on Wednesday 14 January under the short-period method; and
- a 12-day filing period from Monday 5 January 2026 has a raw result of Saturday 17 January, which moves to Monday 19 January because the court office is closed.
Court Rules Mode applies this model. Within it, Exclude Summer Vacation (August) is limited to High Court pleading periods covered by RHC Order 3 rule 3; it is not a general August closure.
The same trigger produces two different dates
The basic difference between methods is clearest when every other input stays the same. Assume a period starts after Thursday 1 October 2026. Exclude that trigger date, include the final date and count forward 30 days.
| Calculator method | Result | Dates omitted from the count |
|---|---|---|
| 30 calendar days | Saturday 31 October 2026 | None |
| 30 working days | Friday 13 November 2026 | Twelve weekend days and the substituted General Holiday on 19 October |
The calendar calculation spans 30 days. The working-day calculation spans 43 because it needs 30 qualifying dates.
The result also lists National Day on 1 October under Excluded Dates. That is the trigger date, which is excluded, so it does not lengthen the period. Monday 19 October does lengthen it, and is gazetted as the day following Chung Yeung Festival because the festival falls on Sunday.
Open the 30-working-day example. Turn on Calendar days to reproduce 31 October without changing the trigger, length or boundaries.
Both dates are calculator results under the stated settings. A rule governing the particular period may still move the Saturday calendar-day result.
Final-day treatment remains separate from the count
The MPF enrolment rule illustrates this separation. The first day of employment is day 1 of a 60-calendar-day period, and Saturdays, Sundays and public holidays remain inside the count. But if day 60 is a Saturday, public holiday, specified warning day or relevant eMPF suspension day, the MPFA extends the deadline to the next qualifying day.
Monthly MPF contributions are generally due on the 10th day of the following month, subject to a stated extension for the same types of event. This is a due-date rule, not a count from an earlier event.
Severe weather affects other periods differently. The IRD has a final-day extension for documents covered by its stamping circular. The first-hand sales definition excludes warning days inside its five-working-day period.
The calculator does not hold historical or live records for T8, Black Rainstorm Warnings, Extreme Conditions, eMPF suspensions or unscheduled office closures. A preset Shutdown Period is also only a stated calendar assumption; it does not establish that a private closure forms part of the applicable rule.
Keep a record of the calculation used
A date alone does not show its method or assumptions. Record the source wording, trigger, method, boundaries, exclusions, raw result and final adjustment.
For the calendar-day comparison above, that record could read:
30 calendar days after 1 October 2026; trigger excluded; final date included; raw result 31 October 2026; final-day treatment not assessed.
For the Land Registry, distinguish the one-month registration-priority period from its published 2025/26 14-working-day performance pledge. The latter is a service standard after lodgement, not a period for preserving priority.
Recording the method matters most where two Hong Kong rules could plausibly apply to the same transaction. A date labelled only "30 days" does not show whether it came from the stamping period, a contractual working-day clause or a court rule — and those three would not fall on the same day.
Sources and verification
Sources checked on 3 August 2026:
- Labour Department via 1823: notice periods and payment in lieu — notice units, boundaries and month examples.
- GovHK: Time limit for stamping — document-specific periods and the two-agreement rule.
- MPFA: Enrolment for employees — 60 calendar days and final-day extension.
- MPFA: Contribution Days Calendar — monthly contribution date and rollover conditions.
- Sales of First-hand Residential Properties Authority: purchaser FAQs — five-working-day period and its definition.
- Hong Kong e-Legislation: Rules of the High Court, Order 3 rule 2 and Rules of the District Court, Order 3 rule 2 — primary court time-computation rules and short-period exclusions.
- Hong Kong Judiciary: Common Requisition Codes — practical summary of the High Court short-period exclusions.
- Land Registry: Registration FAQs and performance pledges — one-month priority treatment and separate service target.
- GovHK: General Holidays for 2026 and Labour Department: Statutory Holidays for 2026 — the two holiday lists and their different purposes.
