Real holiday calendars and per-country weekends, the same data the API serves. Pick a region, pick a calculation, get a date you can rely on.

A few dozen free calculations a day. Need this in code? The API answers the same questions in one GET request, and the playground covers the fancier ones: due dates, paydays, bridge days.

Notes

Weekends vary by country (Friday-Saturday across much of the Middle East, Saturday only in Nepal). Substitute holidays are included: when 2027-12-25 falls on a Saturday, the UK calendar carries the observed days that follow. Market calendars (XNYS, ECB) differ from national ones.

More calculators

Invoice due datesPayroll datesHoliday calendarsCommon working daysSettlement dates (T+1/T+2)SLA deadlines

Country calculators

Each page carries that country's upcoming holidays and weekend rule.