Date Calculator
How many days — and how many of them are working days.
Reading your result
Fill in every field and the steps will be spelled out here.
How it is calculated
The classic off-by-one comes from the start date. August 1st to August 3rd is either two days or three, depending on convention — tenancies and contracts usually count both ends, countdowns and age do not. That single choice explains most disagreements between date calculators, so this one asks.
Weekdays here means weekends removed, nothing else. Public holidays are deliberately not deducted: they differ by country and shift every year, and an embedded table would be stale within months. Subtract the holidays in your own calendar for a true working-day count.
Counting in months is a different problem. One month after January 31st is either February 28th or March 3rd depending on the rule you adopt. Counting in days avoids that ambiguity entirely, which is what this does.
Frequently asked questions
How is a countdown counted?
Normally without the start day. If today is the 13th and the target is the 20th, that is seven days out.
Why are holidays not excluded?
They move every year and differ by country, so a built-in list would start decaying immediately. Excluding weekends and leaving holidays to you produces fewer wrong answers.
Do past dates work?
Yes — an end date before the start returns a negative count, which is what you want for "days since".
A plain day count. Public holidays, time zones and leap seconds are not considered. For contractual periods, follow the definition in the contract itself.