DateDiff Function [Runtime]

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Returns the number of date intervals between two given date values.

Syntax:

DateDiff (Add, Date1, Date2 [, Week_start [, Year_start]])

Return value:

A number.

Parameters:

Add - A string expression from the following table, specifying the date interval.

Add (string value) Explanation
yyyy Year
q Quarter
m Month
y Day of year
w Weekday
ww Week of year
d Day
h Hour
n Minute
s Second

Date1, Date2 - The two date values to be compared.

Week_start - An optional parameter that specifies the starting day of a week.

Week_start value Explanation
0 Use system default value
1 Sunday (default)
2 Monday
3 Tuesday
4 Wednesday
5 Thursday
6 Friday
7 Saturday

Year_start - An optional parameter that specifies the starting week of a year.

Year_start value Explanation
0 Use system default value
1 Week 1 is the week with January, 1st (default)
2 Week 1 is the first week containing four or more days of that year
3 Week 1 is the first week containing only days of the new year

Example:

Sub example_datediff
    MsgBox DateDiff("d", "1/1/2005", "12/31/2005")
End Sub