在古典音樂史中,共曉時期(英語:Common practice period)是指從調性體系的形成到瓦解的這段時期。一般來說,巴洛克音樂中後期、古典主義時期和浪漫主義時期,或者說從大約1650年到1900年的這段時期是典型的共曉時期。共曉時期特有的主流音樂模式和一些約定俗成的慣例將其同其他音樂時期區分開來,其中最具識別性的特徵是其對調性體系的強烈依賴。
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