PrismKit計算機日期差距計算機日期差距計算機在瀏覽器中執行本機複製連結Markdown計算兩個日期之間相差的年、月、日與工作日，總計精確到秒。函數繪圖器Plot several functions of x with pan, zoom, degrees or radians and a tracing cursor.日期加減計算機Add or subtract years, months, weeks, days, hours or business days from a date and get the weekday and ISO week.