VBScript DateDiff Function


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It is a function that returns the difference between two specified time intervals.

Syntax

DateDiff(interval, date1, date2 [,firstdayofweek[, firstweekofyear]]) 

Parameter Description

  • Interval, a Required Parameter. It can take the following values −

    • d − day of the year.

    • m − month of the year

    • y − year of the year

    • yyyy − year

    • w − weekday

    • ww − week

    • q − quarter

    • h − hour

    • n − minute

    • s − second

  • date1 and date2 are Required parameters.

  • firstdayofweek is Optional. Specifies the first day of the week. It can take the following values −

    • 0 = vbUseSystemDayOfWeek − Use National Language Support (NLS) API setting

    • 1 = vbSunday − Sunday

    • 2 = vbMonday − Monday

    • 3 = vbTuesday − Tuesday

    • 4 = vbWednesday − Wednesday

    • 5 = vbThursday − Thursday

    • 6 = vbFriday − Friday

    • 7 = vbSaturday − Saturday

  • firstdayofyear is Optional. Specifies the first day of the year. It can take the following values −

    • 0 = vbUseSystem − Use National Language Support (NLS) API setting

    • 1 = vbFirstJan1 − Start with the week in which January 1 occurs (default)

    • 2 = vbFirstFourDays − Start with the week that has at least four days in the new year

    • 3 = vbFirstFullWeek − Start with the first full week of the new year

Example

<!DOCTYPE html>
<html>
   <body>
      <script language = "vbscript" type = "text/vbscript">
         fromDate = "01-Jan-09 00:00:00"
         toDate = "01-Jan-10 23:59:00"
         document.write("Line 1 : " &DateDiff("yyyy",fromDate,toDate) & "<br />")
         document.write("Line 2 : " &DateDiff("q",fromDate,toDate) & "<br />")
         
         document.write("Line 3 : " &DateDiff("m",fromDate,toDate) & "<br />")
         document.write("Line 4 : " &DateDiff("y",fromDate,toDate) & "<br />")
         
         document.write("Line 5 : " &DateDiff("d",fromDate,toDate) & "<br />")
         document.write("Line 6 : " &DateDiff("w",fromDate,toDate) & "<br />")
         
         document.write("Line 7 : " &DateDiff("ww",fromDate,toDate)& "<br />")
         document.write("Line 8 : " &DateDiff("h",fromDate,toDate) & "<br />")
         
         document.write("Line 9 : " &DateDiff("n",fromDate,toDate) & "<br />")
         document.write("Line 10 : "&DateDiff("s",fromDate,toDate) & "<br />")

      </script>
   </body>
</html>

When you save it as .html and execute it in Internet Explorer, then the above script will produce the following result −

Line 1 : 1
Line 2 : 4
Line 3 : 12
Line 4 : 365
Line 5 : 365
Line 6 : 52
Line 7 : 52
Line 8 : 8783
Line 9 : 527039
Line 10 : 31622340
vbscript_date.htm
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