Skip to content
littlekit.app
All tools

Business days calculator

Count working days with selectable weekdays, endpoint rules and your own holiday dates.

Working-day calendar22 workdays
Non-working weekdays8
Weekday holidays0
September 2026
MonTueWedThuFriSatSun
Pick a day. Arrow keys move by a day or a week.

Shaded: working · faded: off · crossed out: holiday. The calendar edits the end date.

Dates considered30
YYYY-MM-DD
YYYY-MM-DD
Working weekdays
YYYY-MM-DD, one per line or comma separated. Up to 500.
Processed on your device

How it works & useful details

How it works & limits

Choose a forward date range, which endpoints to include, working weekdays and any holidays you want excluded. No public holiday calendar is assumed or downloaded.

Holiday dates use YYYY-MM-DD, separated by commas or whitespace. Duplicate holidays count once. Holidays on already non-working weekdays or outside the selected range do not subtract twice. Limit: 500 holiday entries and a range of 36,600 days. Calendar dates are unaffected by DST.

Your working space

Explore the live preview, then save a copyable text report. Inputs stay on this device and are cleared by refreshing. Dates use the Gregorian calendar, including before its historical introduction.