When it was exactly noon, the siren sounded from the fire department in my community every day. Therefore, people knew that it was twelve o’clock by the siren and wanted to eat lunch.
Use an introductory phrase to help show us the time, “When it was noon.” This is a good technique.
The word “everyday” together is an adjective and must modify a noun. We could say everyday wear.
Also, it rang at night and people couldn’t be on the street by law.
If you must stay home at any time by law it is called a “curfew.”