LankaTools
✦ Dates & Time

Working Days Calculator

Count working days or find a date using your own work calendar.

In your browser
WorkspaceIn your browser
Choose a real date, year 0001–9999.
Choose a real date, year 0001–9999.
Your working calendarNon-working weekdays: Sunday · Saturday
Non-working weekdays

Choose every weekday normally off. Saturday and Sunday are selected initially; change this to match your workplace.

Optional: one YYYY-MM-DD date per line, up to 5,000 entries. Duplicates are ignored. Dates outside the range have no effect.

Your working-day plan appears here

Choose dates and your calendar, then calculate.

This counter uses your chosen weekdays off and your own holiday / leave dates. It does not include an official Sri Lankan holiday calendar or determine leave entitlement. A holiday on an off-day is counted once. Both endpoints are included by default; you can exclude either.

How this planner counts

Are holidays automatically included?

No. Paste your own workplace holidays or leave dates, one date per line. A holiday on a weekday already marked off is counted only once. Public, bank and workplace calendars can differ.

Does adding workdays count the start date?

No. Adding 1 working day from Friday with Saturday/Sunday off gives Monday. Subtracting 1 from Monday gives Friday. Zero leaves the date unchanged. In range mode, the two endpoint checkboxes control inclusion.

Can I use a six-day or rotating workweek?

Any recurring weekly pattern is supported: choose the weekdays off, including Friday/Saturday or Sunday only. For rotating shifts, enter additional dates off yourself; this tool does not infer a roster.

Is this a legal deadline or leave entitlement?

This is a calendar calculation based only on the rules you enter. It does not decide statutory deadlines, notice periods, paid leave or employer policy.

Gregorian calendar dates only: no time of day, timezone or daylight-saving adjustment. Processing stays in your browser.