Description
Tests whether a string value is a valid date.
Syntax
IsDate ( datevalue )
|
Argument |
Description |
|---|---|
|
datevalue |
A string whose value you want to test to determine whether it is a valid date |
Return value
Boolean. Returns true if datevalue is a valid date and false if it is not.
Examples
This expression returns true:
IsDate("Jan 1, 99")This expression returns false:
IsDate("Jan 32, 2005")This expression for a computed field returns a day number or 0. If the date_received column contains a valid date, the expression returns the number of the day in date_received in the computed field, and otherwise returns 0:
If(IsDate(String(date_received)), DayNumber(date_received), 0)
