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Sri Lanka Working Day

Checks a date against the Saturday-Sunday weekend baseline and exact 2026-2026 authority events.

When to use

You need a deterministic Sri Lanka Sri Lanka 2026 public, bank, mercantile and full-moon Poya holiday calendar, plus dated temporary government-office closures result.

Do not use when: This is a combined official holiday-class calendar, not a universal private-employer closure rule. Public, bank and mercantile classifications remain in each event kind; the March 18, March 25 and April 1 fuel-conservation entries apply to government offices only and the schedule was cancelled effective April 8. Essential services, schools, private employers, sector agreements, local arrangements and later unlisted notices are not inferred. The additional day after the National Vesak Festival is not invented beyond the published May 2 calendar entry.

Example user requests

Sri Lanka: Poya holiday.
Sri Lanka: Temporary government-office Wednesday.

Formula

is_working_day = not an official Saturday/Sunday weekend date and no exact authority event

Apply the pinned authority event table over the declared weekday baseline; do not infer uncovered employer or regional schedules.

Inputs

Parameter	Type	Unit	Required	Description
`date`	date		yes	Gregorian date in Sri Lanka's pinned 2026 combined public/bank/mercantile holiday coverage over a Saturday-Sunday weekend.

Outputs

Output	Type	Description
`territory`	string	LK (Sri Lanka).
`territory_name`	string	Sri Lanka
`weekday`	string	Gregorian weekday.
`is_working_day`	boolean	Monday-Friday with no event in this pinned authority scope.
`day_type`	string	Deterministic classification: official_weekend, regular_workday, or the first published authority event kind.
`holiday_names`	string_list	Events applying on the date.
`holiday_kinds`	string_list	Authority event classifications.
`holiday_details`	list	Structured event details, including partial-day notes where published.
`calendar_scope`	string	Sri Lanka 2026 public, bank, mercantile and full-moon Poya holiday calendar, plus dated temporary government-office closures
`holiday_policy`	string	Sri_Lanka_Holidays_Act_No_29_of_1971_2026_public_bank_mercantile_and_Poya_calendar
`substitute_day_policy`	string	published_official_dates_only; no next-day or employer-lieu inference; later Gazette or official circular overrides
`calendar_profile`	string	sri-lanka-public-holidays
`dataset_version`	string	lk-public-bank-mercantile-2026.1
`sources`	list	Authority and legislation sources.

Example

Poya holiday: {"date":"2026-08-27"} → {"is_working_day":false,"day_type":"poya_public_bank"}

Temporary government-office Wednesday: {"date":"2026-03-25"} → {"is_working_day":false,"day_type":"public_sector_scheduled_holiday"}

GET https://tttkmbb.com/api/v1/calculate/sri-lanka-public-working-day?date=2026-08-27

Machine access

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

Sources

Sri Lanka Ministry of Public Administration – 2026 Holidays Act Gazette (government_official_gazette_pdf)
Sri Lanka Government Documents Portal – 2026 Desk Calendar (government_official_calendar_pdf)
Central Bank of Sri Lanka – Bank Holidays for 2026 (official_bank_cross_check)
Sri Lanka Ministry of Public Administration – Circular 09/2026(I) (government_official_circular_pdf)
Sri Lanka Department of Government Information – special government holiday announcement (government_official_news_release)
Daily Mirror – Vesak follow-up clarification (reputable_news_cross_check)
Sunday Times – temporary Wednesday public-sector schedule (reputable_news_cross_check)

FAQ

Does a public holiday guarantee that every private employer closes?

No. Public, bank and mercantile classifications are returned as source evidence; private-employer, sector and local closure rules are not inferred.

Are the Wednesday fuel-conservation holidays still open-ended?

No. Only March 18, March 25 and April 1 are represented; the official cancellation made Wednesdays normal government-office working days from April 8, 2026.

Related calculators

Add Sri Lanka Working Days — Offset through the same authority package.