GT_BOW() Return the data for the start of the week ( Monday )
GT_DATEADJUST() Take a date and add days, months and years to it
GT_DAYSINMONTH() Return the number of days in a month
GT_DOW2C() character value for numeric week day
GT_DOW2N() Numeric day of week from a full or partial character string
GT_ENDOFMONTH() Find the last weekday of a month
GT_ISBUSDAY() See if a date is a business day
GT_ISDOW() logically evaluate a textual day of the week
GT_LEAPYEAR() Find out if a date is in a leap year
GT_MDAYS() Days in the month
GT_ROLLFWD() Roll a date forward
GT_SETDATE() Set the DOS system date.
GT_SETTIME() Set the DOS system time.
GT_STOD() Convert a YYYYMMDD string to a Clipper date.
GT_STOD1() Convert a date in the format DDMMYY to a Date type
GT_TEXTDATE() Return a text string of a date