Exclusive days = end - start in days (no endpoints added).
Inclusive days = (end - start) + 1 (counts both start and end).
Business days counts Mon-Fri only (no holiday calendar). Weekends are removed.
DST-safe: calculations normalize both dates to UTC midnight to avoid timezone drift.
Reversed input (start after end) is handled automatically; the count is based on the absolute span.
Edge cases & notes
If start = end: Exclusive → 0 days; Inclusive → 1 day (or 1 business day if it's Mon-Fri, otherwise 0).
Business days (Exclusive) excludes the start day; Inclusive counts both ends when they are weekdays.
This tool does not load a holiday calendar. If you need holidays, apply your own list and subtract them.
Cookies & privacy
Utilities Bunker uses necessary cookies to run the site. Optional cookies help remember preferences,
measure usage, and improve the platform. You can change your choices any time.
Privacy Policy.
