The purpose of a date calculator is to determine the difference in time between two dates. This difference can be expressed as a number of days between two dates or the date on which the addition or subtraction of a number of days falls.
Date calculators have many modern business applications. A business date calculator can find a future date by excluding weekends and holidays. The difference between a specific number of calendar days and the same number of business days can have important legal and commercial ramifications for businesses and consumers, such as in a response to a demand for payment or determining compliance with a court order. Other uses for date calculators are for business planning, project management and for scheduling court dates.