Add business days, count working days between dates, compute working hours across timezones with DST, and look up public holidays — with deterministic, versioned, auditable answers. Stop hand-rolling it.
Get your API key → Try it liveLive demo — real holiday logic (weekends, public holidays & observed days). Inclusive of both dates, like Excel's NETWORKDAYS.
“Respond within 8 business hours” — computed correctly across DST transitions and time zones. The thing nobody else offers as a clean API.
Pin an answer to a dataset version (?dataset=2026.1). Reproducible and auditable — for settlement dates, statutory deadlines & SLAs.
Subdivision holidays, non-Sat/Sun weekends, custom company & exchange calendars (NYSE/LSE). One call, correct everywhere.
Free tier allows commercial use. Upgrade for working-hours, custom calendars & versioned data.
Reserve your API key and get launch pricing. No spam, just the launch email.
Reserve your API key →We’ll email you the moment Datewise is live, with early-bird pricing.