Day Counter
Count days, weeks, and months between two dates, with business-day option.
Two dates
Pick both dates.
Counting conventions
This counter excludes the start date and includes the end date — the standard for 'days until.' Business days skip Saturdays and Sundays but not public holidays, which vary by country and year; subtract those manually for deadline work.
Common anchors
Useful constants: a year is 365 or 366 days, a quarter about 91, and any date moves one weekday later each year (two after a leap day). For project planning, 21 business days ≈ one calendar month.
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