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VBscript Built-in Functions

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DatePart

Gives the specified part of a given date

DatePart(interval, date[, firstdayofweek[, firstweekofyear]])

The DatePart function syntax has these parts:

 

Part Description
interval Required. String expression that is the interval of time you want to return. See Settings section for values.
date Required. Date expression you want to evaluate.
firstdayof week Optional. Constant that specifies the day of the week. If not specified, Sunday is assumed. See Settings section for values.
firstweekofyear Optional. Constant that specifies the first week of the year. If not specified, the first week is assumed to be the week in which January 1 occurs. See Settings section for values.
 

The interval argument can have the following values:

 

Setting Description
yyyy Year
q Quarter
m Month
y Day of year
d Day
w Weekday
ww Week of year
h Hour
n Minute
s Second

The firstdayofweek argument can have the following values:

 

Constant Value Description
vbUseSystem 0 Use National Language Support (NLS) API setting.
vbSunday 1 Sunday (default)
vbMonday 2 Monday
vbTuesday 3 Tuesday
vbWednesday 4 Wednesday
vbThursday 5 Thursday
vbFriday 6 Friday
vbSaturday 7 Saturday
The firstweekofyear argument can have the following values:

 

Constant Value Description
vbUseSystem 0 Use National Language Support (NLS) API setting.
vbFirstJan1 1 Start with the week in which January 1 occurs (default).
vbFirstFourDays 2 Start with the week that has at least four days in the new year.
vbFirstFullWeek 3 Start with the first full weekof the new year.
 

You can use the DatePart function to evaluate a date and return a specific interval of time. For example, you might use DatePart to calculate the day of the week or the current hour.

The firstdayofweek argument affects calculations that use the "w" and "ww" interval symbols.

If date is a date literal, the specified year becomes a permanent part of that date. However, if date is enclosed in quotation marks (" "), and you omit the year, the current year is inserted in your code each time the date expression is evaluated. This makes it possible to write code that can be used in different years.





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