Coverage and methodology
Calendar coverage
How bizdaycalc counts working days and which calendars are currently covered.
Current coverage
bizdaycalc currently supports the United Kingdom, Ireland, and United States with listed public holidays for 2026 and 2027.
Working-day rule
Working days are counted as Monday to Friday. When public holiday exclusion is enabled, listed public holidays for the selected country are excluded from the working-day total.
Important caution
Use this site as a planning aid. Legal, contractual, payroll, tax, court, complaint, or regulated deadlines can have special rules, cut-off times, local calendars, and exceptions. Always verify important deadlines against the official rule or professional advice.