辰時是早上7-9點。剩下的十一個時辰：子時23-1點，丑時1-3點，寅時3-5點，卯時5-7點，巳時9-11點，午時11-13點，未時13-15點，申時15-17點，酉時17-19點，戌時19-21點，亥時21-23點。

中國(guo)的(de)古(gu)時(shi)(shi)(shi)(shi)候就把一(yi)天劃分為十(shi)(shi)(shi)二(er)(er)個(ge)(ge)時(shi)(shi)(shi)(shi)辰(chen)(chen)(chen)，每個(ge)(ge)時(shi)(shi)(shi)(shi)辰(chen)(chen)(chen)相當于兩小時(shi)(shi)(shi)(shi)。相傳(chuan)，古(gu)人根(gen)據中國(guo)十(shi)(shi)(shi)二(er)(er)生肖中的(de)動物的(de)出(chu)沒時(shi)(shi)(shi)(shi)間來(lai)命名各(ge)個(ge)(ge)時(shi)(shi)(shi)(shi)辰(chen)(chen)(chen)。十(shi)(shi)(shi)二(er)(er)時(shi)(shi)(shi)(shi)辰(chen)(chen)(chen)制在西(xi)周的(de)時(shi)(shi)(shi)(shi)候就已經被人們所使用(yong)。在漢(han)代的(de)時(shi)(shi)(shi)(shi)候把十(shi)(shi)(shi)二(er)(er)個(ge)(ge)時(shi)(shi)(shi)(shi)辰(chen)(chen)(chen)命名為夜半、雞鳴(ming)、平(ping)旦、日(ri)出(chu)、食時(shi)(shi)(shi)(shi)、隅(yu)中、日(ri)中、日(ri)昳、晡時(shi)(shi)(shi)(shi)、日(ri)入、黃昏、人定。后(hou)來(lai)又用(yong)十(shi)(shi)(shi)二(er)(er)地支(zhi)來(lai)表(biao)示，以夜半二(er)(er)十(shi)(shi)(shi)三點(dian)(dian)至(zhi)一(yi)點(dian)(dian)為子時(shi)(shi)(shi)(shi)，一(yi)至(zhi)三點(dian)(dian)為丑時(shi)(shi)(shi)(shi)，三至(zhi)五點(dian)(dian)為寅時(shi)(shi)(shi)(shi)，依(yi)次遞(di)推。

十(shi)二(er)時(shi)(shi)(shi)(shi)辰養生詩：寅時(shi)(shi)(shi)(shi)天亮便起身，喝杯開(kai)水(shui)樓(lou)下行(xing);，定時(shi)(shi)(shi)(shi)如廁輕(qing)如許，卯時(shi)(shi)(shi)(shi)晨練最(zui)宜人;辰時(shi)(shi)(shi)(shi)看(kan)書戲幼孫，巳時(shi)(shi)(shi)(shi)入(ru)(ru)廚當(dang)灶君，午時(shi)(shi)(shi)(shi)進(jin)餐酒少飲，未時(shi)(shi)(shi)(shi)午休要抓緊;申時(shi)(shi)(shi)(shi)讀報寫詩文，酉(you)時(shi)(shi)(shi)(shi)戶(hu)外(wai)看(kan)流云，戌時(shi)(shi)(shi)(shi)央視(shi)新聞到，閉目聆聽好養神，亥時(shi)(shi)(shi)(shi)過(guo)半(ban)快(kuai)洗(xi)漱，子時(shi)(shi)(shi)(shi)夢中入(ru)(ru)畫屏，丑(chou)時(shi)(shi)(shi)(shi)小解一(yi)時(shi)(shi)(shi)(shi)醒，輕(qing)摩“三丹”氣(qi)血盈;脈絡通暢心如水(shui)，一(yi)覺(jue)睡到金(jin)雞鳴。