当立之年

Pinyin: dāng lì zhī nián Usage: 偏正式；作宾语；指三十岁 Explanation: 指三十岁。 Source: 先秦·孔子《论语·为政》：“三十而立。” Thesaurus:  A man should be independent at the age of thirty. / At thirty, a man should be able to think for himself., Thirty years of age Year