Day(date)
Returns the ordinal for the day of the month, ranging from 1 to 31.
See also DayOfWeek, DayOfWeekAsString, DayOfYear, DaysInMonth, DaysInYear, and FirstDayOfMonth.
Any date.
Years less than 100 are interpreted as 20th century values.
When passing a date/time value as a string, make sure it is enclosed in quotes. Otherwise, it is interpreted as a number representation of a date/time object, returning undesired results.