Ruby/ice_cube: Exclude whole day for hourly recurring event

Just started playing around with ice_cube I've got a weekly schedule (with a granularity of half an hour) created

schedule = IceCube::Schedule.new(Time.now.change(:min => 30))

with several rules (let's say 20) such as e.g.

IceCube::Rule.weekly.day(:tuesday).hour_of_day(14).minute_of_hour(30)

IceCube::Rule.weekly.day(:wednesday).hour_of_day(10).minute_of_hour(0)

Now I'd like to exclude a full day, which would subsequently exclude all occurrences during this full day.

I've tried

schedule.add_exception_date [DATE]

but it seems that my exception has to match the event exactly.

Is there a way to get this done without looping through all rules and creating exception for the exact times for the date specified?

Update:

To make a better example:

Weekly schedule:
  * Every monday at 14:40
  * Every monday at 15:00
  * Every thursday at 16:00 
  * Every saturday at 10:00

Exception date:
  Tuesday, 13th of September 2011

=> For the week from Monday 12th to Sunday 18th I'd like to get only the occurrences on Thursday and Saturday.

One solution could look something like this, but it's a little icky:

schedule    = IceCube::Schedule.from_yaml([PERSISTED SCHEDULE])
occurrences = schedule.occurrences_between([START TIME], [END TIME])
exceptions  = schedule.exdates.map(&:to_date)
occurrences.reject {|occurrence|
  exceptions.include?(occurrence.to_date)
}

—Any better ideas?

Solution

Since there seems to be no other solution and in order to close this question, here’s what I'm using (as described in an update to the original question above already):

schedule    = IceCube::Schedule.from_yaml([PERSISTED SCHEDULE])
occurrences = schedule.occurrences_between([START TIME], [END TIME])
exceptions  = schedule.exdates.map(&:to_date)
occurrences.reject {|occurrence|
  exceptions.include?(occurrence.to_date)
}