Choose the task
Count an interval or move a date forward or backward.
Three short steps
From question to a verifiable answer
State the day rules
Choose calendar or business days and, for an interval, which boundaries count.
Read the server result
The API applies java.time calendar arithmetic and returns the rule beside the answer.
Everyday deadline questions
Useful when one day changes the plan
- Check the elapsed calendar days in a notice, rental, trip, or project window.
- Turn a shipping promise stated in business days into an expected weekday date.
- Explain whether a start date, end date, or both were included in a reported total.
Ready for the next date question
Make the counting rule visible
Choose two dates and get calendar, business, and weekend totals without a spreadsheet.