Hong Kong Lunar Calendar Holidays: Why Dates Shift Every Year

Copy last year's deadline calendar into this year's planner and at least one date will be wrong. That is because 8 of Hong Kong's 17 General Holidays follow the Chinese lunar calendar — and the lunar calendar drifts against the Gregorian calendar by up to 19 days from year to year.

Add three Easter-based holidays that also shift annually, and 11 of 17 General Holidays land on a different date every year.

Which holidays are fixed and which move

Fixed-date holidays (6 holidays)

These fall on the same Gregorian date every year:

Easter-based holidays (3 holidays)

Easter follows the Western ecclesiastical calendar and shifts each year:

Lunar calendar holidays (8 holidays)

These follow the Chinese lunisolar calendar:

Why the dates move

The Chinese calendar is lunisolar: months track the moon (roughly 29.5 days each), but the system inserts leap months every few years to stay aligned with the solar year. The result is that Chinese calendar dates drift against Gregorian dates — but within a bounded range. Lunar New Year, for example, always falls between 21 January and 20 February.

Ching Ming is the odd one out. It is defined by the solar term qīngmíng (the point when the sun reaches 15° celestial longitude) and almost always lands on 4 or 5 April — far more predictable than the purely lunar holidays.

How much dates actually move: 2026 vs 2027

The year-to-year shift can be dramatic:

Mid-Autumn's following day falls on nearly the same Gregorian date both years — but Saturday in 2026, Sunday in 2027 — so the substitution mechanism and working-day impact are completely different. And the 10-day Chung Yeung shift means a deadline that cleared the holiday comfortably in 2026 might land squarely on top of it in 2027.

Three risks for anyone setting multi-year deadlines

1. Template reuse breaks. A deadline that fell on a working day in 2026 might fall on a holiday in 2027. Last year's dates are not this year's dates.

2. Clustering is unpredictable. In 2026, Ching Ming collides with Easter to create a five-day block (3–7 April). In 2027, Easter falls in March and Ching Ming stands alone. The cluster effect reshuffles every year.

3. Substitution cascades. When a lunar holiday falls on Sunday, the substitute pushes into the following week — and can bump other holidays further along. In 2026, the Ching Ming substitute on Monday 6 April forces Easter Monday's designation to Tuesday 7 April.

Gazetted dates vs planning dates: know the difference

The 2027 dates above come from the Hong Kong Observatory's lunar-calendar conversion tables — useful for forward planning, but not the official gazetted holiday list for that year. The government formally gazettes each year's General Holidays well in advance, and the gazetted list may include substitution adjustments that raw lunar dates do not reflect.

For any deadline more than 3 months out:

1. Check the gazetted holiday list for the relevant year on GovHK
2. Do not rely on previous years or lunar-calendar conversions alone
3. Run the calculation through a tool that uses the correct year's data — see also General Holidays 2026 for the full gazetted list
4. If the deadline is near a variable holiday, run a sensitivity check — one day's shift in the holiday can cascade through the rest of the week

The HK calculator uses the gazetted holiday list for each supported year, so working-day counts reflect the correct official dates automatically.

Official sources

• GovHK: General Holidays for 2026
• Cap. 149 General Holidays Ordinance
• Hong Kong Observatory: Gregorian-Lunar Calendar Conversion