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Some clocks might have a sensor that automatically turns off the sound when it gets dark. Most battery-operated cuckoo clocks come with a switch or a button to control the sound. Typically, you can turn off the cuckoo sound at night by either flipping a switch or pressing a button designated for this purpose.
If you're unsure about how to turn off the sound on your specific cuckoo clock, it's best to refer to the user manual that came with the clock. If you no longer have the manual, you can try looking up the model online or contacting the manufacturer for instructions.
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