PrismKitCalculatorsDate Difference CalculatorDate Difference CalculatorRuns in your browserLocalCopy linkMarkdownCount the years, months, days and business days between two dates, with totals down to the second.Function PlotterPlot several functions of x with pan, zoom, degrees or radians and a tracing cursor.Date Add CalculatorAdd or subtract years, months, weeks, days, hours or business days from a date and get the weekday and ISO week.