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Add Singapore Official Working Days
Adds or subtracts dates using Singapore's pinned national public-holiday dates and the CLDR Saturday/Sunday baseline.
When to use
You need a deterministic Singapore date offset in 2026-2027 and accept the stated employer-rest-day limitation.
Do not use when: You need an employer-specific roster, bank/exchange calendar or a date outside 2026-2027.
Example user requests
- Add five Singapore working days after 2027-02-05.
Formula
move one day at a time; decrement remaining only when Singapore status.is_working_day=true
Skip CLDR weekend dates and pinned MOM public-holiday dates; do not infer employer rest-day substitutions.
Inputs
| Parameter | Type | Unit | Required | Description |
|---|---|---|---|---|
start_date | date | yes | Gregorian start date in 2026-2027. | |
working_days | integer | yes | Signed offset; start date is excluded for non-zero offsets. Range: ≥ -1000, ≤ 1000 |
Outputs
| Output | Type | Unit | Description |
|---|---|---|---|
start_date | date | Input date. | |
result_date | date | Date reached. | |
working_days_added | integer | Signed requested offset. | |
calendar_days_elapsed | integer | Signed Gregorian difference. | |
public_holidays_skipped | list | MOM holidays crossed. | |
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
Offset across Chinese New Year: {"start_date":"2027-02-05","working_days":5} → {"result_date":"2027-02-15"}
GET https://tttkmbb.com/api/v1/calculate/singapore-add-working-days?start_date=2027-02-05&working_days=5
Machine access
- API:
GET https://tttkmbb.com/api/v1/calculate/singapore-add-working-days(query parameters) orPOSTwith a JSON body{"inputs": {...}} - Schema: https://tttkmbb.com/api/v1/calculators/singapore-add-working-days · Markdown: https://tttkmbb.com/everyday/singapore-add-working-days.md · JSON definition: https://tttkmbb.com/everyday/singapore-add-working-days.json
- MCP: server
https://tttkmbb.com/mcp, tooladd_singapore_working_days - OpenAPI operationId:
add_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
Are employer rest days included?
No. Only the public-holiday package and weekly baseline are used.
Related calculators
- Singapore Official Public-Holiday Working Day — Inspect one date and its official sources.