Yup! A weekly 30 second test.

That was common in the town where I grew up. The sirens were used as tornado warnings, so they made sure they were in good working order.

It's relatively common in small towns. Some towns with volunteer fire departments will have a siren they use both to call all available volunteer firefighters and to announce the need to shelter for a tornado. They used to sound it at noon every day and my wife (then girlfriend) used it as an alarm clock when she worked 2nd shift anytime she slept in too late

About 5 years ago they stopped sounding it at noon, and honestly I'm not sure when the last time i heard the sirens was since tornadic storms are becomes much less common here and the firefighters have become increasingly reliant on their radios instead. I kinda miss it. There's a quaintness to just listening for the noon whistle to tell time