The day parameter passed in a CEEISEC call did not contain a valid day number. The combination of year, month, and day formed an invalid date value. Examples: year=1990, month=2, day=29; or month=6, day=31; or day=0.
The output value is set to 0.
Verify that the day parameter contains an integer between 1 and 31, and that the combination of year, month, and day represents a valid date.
CEE2EF