H_DATEJULIAN() Calculate a real date from a given Julian date
H_DAYDIFF() Calculate the number of days between two dates
H_DAYSINMONTH() Return the number of days in a month
H_ENDOFMONTH() Find the last weekday of a month
H_ISBUSDAY() See if a date is a business day
H_JULIANDATE() Calculate the Julian Date of a given date
H_LEAPYEAR() Find out if a date is in a leap year
H_ROLLFWD() Roll a date forward
H_SECTODAY() Convert a number of seconds to days
H_STOD() Convert a date in the format YYMMDD to a Date type
H_STOD1() Convert a date in the format DDMMYY to a Date type
H_TIMESTRING() Convert a number of seconds into a time string
H_VALIDTIME() Validate a time string