DATEPART (datepart, date_exp)
Returns an integer that represents the datepart of date_exp. For example, a datepart month returns an integer representing the month (January = 1, December = 12). A datepart weekday returns an integer representing the day of the week (Sunday = 1, Saturday = 7).
Datepart is the part of the date to return, and must be one of the following values.
The TZoffset value returns a time zone offset in number of minutes (signed). The DATEPART function with TZoffset works only with SYSDATETIMEOFFSET() and string literals containing a time zone offset. The time zone offset range is from -14:00 through +14:00. See Examples.
Date_exp is an expression that returns a DATETIME value, a value that can be implicitly converted to a DATETIME value, or a character string in a DATE format.