Date Calculator — Differences, Business Days & Timezones
Calculate date differences, add or subtract days, compute business days, and convert timezones. Powered by date-fns for accuracy. Great for project planning and deadline math.
Keywords: date calculator, date difference, date math, business days, date range, timezone converter, add days, subtract dates
Frequently Asked Questions
How are business days calculated?
Business days exclude weekends (Saturday and Sunday) by default. Holidays can be configured if needed.
Can I handle different timezones?
Yes! Select from all IANA timezones for accurate timezone-aware calculations.
What date operations are supported?
Add/subtract days, weeks, months, years; calculate differences; compute business days; work with date ranges and quarters.
How accurate are the calculations?
Powered by date-fns library, one of the most reliable date libraries with comprehensive timezone support.
Can I see ISO week numbers?
Yes, the tool displays ISO week numbers and quarter information for any date.