Sudo code for scheduling

scheduling.cs

//The idea here is there's a difference between how the event repeats (Repetition) and when that repetition occurs (When/NotWhen).

// Between 9am and 6pm, run every 5 minutes, exactly on minute 0,5,10,etc., except on the last day of the month.
// Before 9am and after 6pm, run every 10 minutes, exactly on minute 0,10,20, etc, except on the last day of the month.
// On the last day of the month, run every 20 minutes, exactly on minute 0,20,40.
var config = ScheduleConfig.EveryMinute(5).OnTheMinute(0).When(Between(Hour(9),Hour(18))).WhenNot(DayOfMonth.Last).Named("DayTime")
					.AddRepetition(Repetition.EveryMinute(10).OnTheMinute(0).When(Before(Hour(9)), After(Hour(18))).WhenNot(DayOfMonth.Last).Named("NightTime")
					.AddRepetition(Repetition.EveryMinute(20).OnTheMinute(0).When(DayOfMonth.Last).Named("LastDayOfMonth");

var schedule = new Schedule(scheduleConfig);  //This could also be IObservable....
var schedule.Occurance += occurance_handler;
schedule.Start();

//......

private void Occurance_Handler(object sender, ScheduleOccuranceEventArgs e) {
	
	if (e.previousOccurance != Occurance.Never) {
		var timeSpan = DateTime.Now.Subtract(e.previousOccurance.OccuranceTime);
		//do stuff....
	}
	
	if (e.repetition.Name == "DateTime") {
		// do daytime specific stuff....
	}
}