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Singapore Official Public-Holiday Working Day

Checks a Singapore date using Ministry of Manpower national public holidays and explicitly published observed dates, with a separate employer-rest-day limitation.

When to use

You need Singapore national public-holiday status for 2026-2027.

Do not use when: You need an employer roster, a non-Sunday weekly rest day, bank/exchange closures, or a year outside the pinned MOM coverage.

Example user requests

Is 2027-02-08 a Singapore working day after Chinese New Year?
Check the Singapore public-holiday status of 2026-08-10.

Formula

is_working_day = CLDR weekday baseline and no MOM public-holiday event

Apply the pinned MOM event dates on top of the CLDR Saturday/Sunday baseline. Do not infer an employer's weekly rest day.

Inputs

Parameter	Type	Unit	Required	Description
`date`	date		yes	Gregorian date in the pinned MOM 2026-2027 coverage.

Outputs

Output	Type	Description
`territory`	string	SG.
`territory_name`	string	Singapore.
`weekday`	string	Gregorian weekday.
`is_working_day`	boolean	True when the CLDR Saturday/Sunday baseline is a weekday and no included MOM public holiday applies.
`day_type`	string	Regular weekday, regular weekend or MOM public holiday.
`holiday_names`	string_list	MOM holiday names applying on the date.
`holiday_observed`	boolean	True when the source explicitly publishes an observed date.
`weekend_days`	string_list	CLDR weekend convention used only as the baseline.
`rest_day_policy`	string	Employer-specific weekly rest-day placement is not inferred.
`calendar_scope`	string	Singapore national public holidays plus the CLDR Saturday/Sunday baseline.
`calendar_profile`	string	singapore-mom-public-holidays.
`source_quality`	string	Official Singapore government sources, with employer-rest-day limitation.
`dataset_version`	string	Pinned MOM evidence package.
`sources`	list	Official MOM, government open-data and legislation sources.

Example

Chinese New Year observed date: {"date":"2027-02-08"} → {"is_working_day":false,"holiday_observed":true}

GET https://tttkmbb.com/api/v1/calculate/singapore-working-day?date=2027-02-08

Machine access

API: GET https://tttkmbb.com/api/v1/calculate/singapore-working-day (query parameters) or POST with a JSON body {"inputs": {...}}
Schema: https://tttkmbb.com/api/v1/calculators/singapore-working-day · Markdown: https://tttkmbb.com/everyday/singapore-working-day.md · JSON definition: https://tttkmbb.com/everyday/singapore-working-day.json
MCP: server https://tttkmbb.com/mcp, tool check_singapore_working_day
OpenAPI operationId: check_singapore_working_day
Freshness: static. Authentication: none. Rate limit: fair use (see rate limits).

Sources

Singapore Ministry of Manpower Public Holidays for 2026 (government)
Singapore Ministry of Manpower Public Holidays for 2027 (government)
Singapore public holidays 2027 open-data mirror (government_open_data)
Singapore Holidays Act 1998 (legislation)

FAQ

Does this calculate an employee's rostered rest day?

No. MOM permits an employer to roster the weekly rest day on a day other than Sunday; that roster is not public data.

Are future years extrapolated?

No. The tool fails closed outside the pinned 2026-2027 official coverage.

Related calculators

Global Working Day Reference — Use broad source-labelled coverage when no direct Singapore year is available.