NextTime = NextTime.AddDays(3.4) ' Increment by 3 2/5 days. For example, you can add a fractional number of days, rounded to the nearest millisecond, to a Date variable as follows: Dim NextTime As Date = Now ' Current date and time. Since every Date value is supported by a DateTime structure, its methods give you additional options in adding time intervals. The default CurrentCulture values are determined by Control Panel settings. If DateValue is #, it returns # because 1996 is a leap year.ĭateAdd uses the current calendar setting from the CurrentCulture property of the CultureInfo class in the System.Globalization namespace. In this example, DateAdd returns #, not #. The following example adds one month to January 31: Dim NextMonth As Date = DateAdd(DateInterval.Month, 1, #) If necessary, the day part of the resulting date is adjusted downward to the last day of the resulting month in the resulting year. The DateAdd function never returns an invalid date. These are treated as equivalent because DayOfYear and Weekday are not meaningful time intervals. To add days to DateValue, you can use DateInterval.Day, DateInterval.DayOfYear, or DateInterval.Weekday. For example, you can calculate a date 30 days from today or a time 45 minutes before now. You can use the DateAdd function to add or subtract a specified time interval from a date. MessageBox.Show("New date: " & newDate.ToShortDateString) 'Dim newDate As Date = DateAdd("m", monthsValue, dateValue) ' This statement has a string interval argument, and InputBox("Enter number of months to add", DefaultResponse:="12")ĭim dateValue As Date = Date.Parse(dateEntered)ĭim monthsValue As Integer = Integer.Parse(monthsEntered)ĭim newDate As Date = DateAdd(DateInterval.Month, monthsValue, dateValue) InputBox("Enter a date", DefaultResponse:=) This example takes a date and, using the DateAdd function, displays a corresponding date a specified number of months in the future. Calculated date is before 00:00:00 on January 1 of the year 1, or later than 23:59:59 on December 31, 9999.
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