TEST-DAY-YYYYDDD

The TEST-DAY-YYYYDDD function tests whether a date in Julian date form (YYYYDDD) is a valid date in the Gregorian calendar. Argument-1 of the INTEGER-OF-DAY function must be in Julian date form.

The function type is integer.

Format

argument-1: Must be an integer.

Returned values

If the value of argument-1 is less than 1601000 or greater than 9999999, the returned value is 1, which means the year is not within the range of 1601 to 9999.
If the value of FUNCTION MOD (argument-1 1000) is less than 1 or greater than the number of days in the year determined by FUNCTION INTEGER (argument-1/1000), the returned value is 2, which means the day is not valid in the given year.
Otherwise, the returned value is 0 (zero), which means the date is valid.

Examples

FUNCTION TEST-DAY-YYYYDDD (1995146) returns 0 because the date is valid.

FUNCTION TEST-DAY-YYYYDDD (1295146) returns 1 because the year is invalid and the value of argument-1 is less than 1601000.

FUNCTION TEST-DAY-YYYYDDD (1995446) returns 2 because the day is not valid in the given year and the value of FUNCTION MOD (argument-1 1000) is less than 1 or greater than the number of days in the year determined by FUNCTION INTEGER (argument-1/1000).