[chén hūn dìng xǐng]   

晨    昏    定    省    晚间服侍就寝，早上省视问安。旧时侍奉父母的日常礼节。

晨昏定省，汉语词汇，出自 《礼记·曲礼上》，释义为旧时侍奉父母的日常礼节。

Attend to one's parents' comfort on getting up and going to bed

晨钟暮鼓    晨秦暮楚    晨兴夜寐    晨提夕命    晨参暮礼