Date, holiday, market, and timezone utilities
Calendar logic for product teams and AI tools.
Use one API surface for timestamp conversion, business day calculation, exchange schedules, trading day checks, settlement dates, public holiday lookup, market hours, and timezone conversion.
Seeded country and market calendars cover 2020-01-01 to 2030-12-31.
Holidays
List public holidays for a supported country and seeded year.
Markets
Return local open and close times plus early-close or closure details.
Settlements
Calculate a market T+n settlement date and skipped non-trading dates.
Timezones
Convert an ISO datetime from one IANA timezone to another.
GET https://calendar-api.plus1labs.com/v1/markets/schedule
market=XNYS&date=2026-07-03
22 REST endpoints mapped in the workbench
What the API covers
The frontend includes a polished time-tool workspace, developer details, localized documentation, and configurable analytics, ads, and external links.