Is there such a thing as a twenty-four hour cuckoo clock?
Yes. Look for one that’s labeled “24 hour movement” or “one day”.
http://www.tyrolinternational.com/acb_tyrol/showdetl.cfm?&DID=7&Product_ID=7796
http://www.ticktocksandtapers.com/oneday24hour.html
Are you sure you want it to “coo-coo” every half hour? 