S-COM 6K Owner's Manual page 187

Scheduler
The 6K Controller features a powerful Scheduler program that accepts up to
100 time/date Setpoints. Each setpoint can be programmed to execute a
macro based on the month, day-of-month, day-of-week, hour, and minute of
the real-time clock and calendar, e.g. midnight, December 31st. Wildcards can
be used to program recurring setpoints, e.g. 9:00 AM on the first Saturday of
each month.
The setpoints are compared to the real-time clock/calendar at the start of each
new minute. If a match is found, the setpoint's accompanying Macro command
is executed.
Since the real-time clock has a lithium power source, timekeeping is not
affected by loss of main power.
Leap years are automatically adjusted. The real-time clock and Scheduler are
Year-2000 compliant.
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6K V2.0 12-14-01