Returns a numerical value indicating the day of the month for the specified DateTime value.
The integer portion of the DateTime value specifies the number of days since January 1st, 1900, and the fractional portion of the DateTime value specifies the fraction of the day since midnight.
- DateTime - a double-precision decimal DateTime value.
Will return a value of 2, indicating the 2nd day of the month of January, 2008.
Will return 19, indicating that today is the 19th day of the current month.