Home › Everyday Life › Count Singapore Official Working Days

Count Singapore Official Working Days

Counts Singapore working and non-working dates in a 2026-2027 range using MOM public holidays and the CLDR Saturday/Sunday baseline.

When to use

You need an auditable Singapore working-day count for a pinned year.

Do not use when: You need an employer-specific rest-day roster, bank/exchange closures or future years.

Example user requests

Count Singapore working days from 2027-02-01 to 2027-02-15.

Formula

for each included date: working_days += singapore status.is_working_day

Normalize endpoints, apply endpoint flags, and count the pinned MOM public-holiday calendar over the CLDR weekly baseline.

Inputs

Parameter	Type	Required	Description
`start_date`	date	yes	First date in 2026-2027.
`end_date`	date	yes	Last date in 2026-2027.
`include_start_date`	boolean	default true	Whether start_date participates.
`include_end_date`	boolean	default true	Whether end_date participates.

Outputs

Output	Type	Description
`normalized_start_date`	date	Earlier endpoint.
`normalized_end_date`	date	Later endpoint.
`working_days`	integer	MOM-reference working dates.
`non_working_days`	integer	Weekend and public-holiday dates.
`public_holidays_counted`	list	MOM events in the range.
`territory`	string	SG.
`territory_name`	string	Singapore.
`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

Singapore February 2027: {"start_date":"2027-02-01","end_date":"2027-02-15","include_start_date":true,"include_end_date":true} → {"working_days":10}

GET https://tttkmbb.com/api/v1/calculate/singapore-working-days-between?start_date=2027-02-01&end_date=2027-02-15&include_start_date=true&include_end_date=true

Machine access

API: GET https://tttkmbb.com/api/v1/calculate/singapore-working-days-between (query parameters) or POST with a JSON body {"inputs": {...}}
Schema: https://tttkmbb.com/api/v1/calculators/singapore-working-days-between · Markdown: https://tttkmbb.com/everyday/singapore-working-days-between.md · JSON definition: https://tttkmbb.com/everyday/singapore-working-days-between.json
MCP: server https://tttkmbb.com/mcp, tool count_singapore_working_days
OpenAPI operationId: count_singapore_working_days
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 count a specific employee's rest day?

No. The weekly rest day is employer-rostered and not inferred.

Related calculators

Singapore Official Public-Holiday Working Day — Inspect a date and its source basis.