Parameters

day is an integer between 1 and 31 for the day of month.

month is one of the month strings: JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC

year is a four-digit integer for the year number (for example, 1996).

gmt is either the string “GMT”, which indicates that time comparisons should occur in Greenwich Mean Time, or is left blank so that times are assumed to be in the local time zone. The GMT parameter can be specified in any of the call profiles, always as the last parameter. If only a single value is specified from each category (day, month, year), the function returns a true value only on days that match that specification. If two values are specified, the result is true from the first time specified through the second time specified.