What this calculator does
Scheduling across time zones is a common source of missed meetings and awkward follow-ups. This tool converts a specific date and time between major zones and counts the business days between two dates.
Use it to plan calls with distributed teams, estimate delivery windows or check how many working days remain before a deadline. Weekend handling follows a standard Monday–Friday calendar.
Business days
Business days = weekdays between start and end − optional holidays The start date is excluded and the end date is included, matching common project-planning conventions. Saturdays and Sundays are skipped automatically.
How this calculator works
- 01
Choose a mode
Use time zone conversion for meetings, or business days for deadlines and delivery estimates.
- 02
Enter date and time
Pick a date and time, then select the source and target time zones. The converted time updates instantly.
- 03
Add holidays if needed
For business day counts, enter the number of public holidays to exclude for a more accurate result.
Frequently asked questions
Does daylight saving time affect the conversion?
Yes. The converter uses the Intl time zone database and accounts for daylight saving transitions on the selected date. Always double-check around changeover weekends.
Are weekends excluded?
Yes, business days exclude Saturdays and Sundays by default. Holidays are not detected automatically because they vary by country; enter the number manually.
Is the start or end date included?
The start date is excluded and the end date included. This matches most deadline and delivery conventions. Adjust by one day if your policy differs.
Data basis: 2026 · Annual constants live in structured JSON files and are updated once a year.
Results are unverified model calculations and do not replace tax, legal or financial advice.