Clocks and watches are relatively new inventions.
What does this have to do with noon? Milites dato signo celeriter ad munitionem perveniunt eamque transgressi trinis castris potiuntur; ac tanta fuit in castris capiendis celeritas, ut Teutomatus, rex Nitiobrigum, subito in tabernaculo oppressus, ut meridie conquieverat, superiore corporis parte nudata vulnerato equo vix se ex manibus praedantium militum eriperet.
In churches and town centers and sometimes in clocks found in houses the bell would chime every new hour.