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Jyutping jat1 jat6 zi1 gai3 zoi6 jyu1 san4
Pinyin yī rì zhī jì zài yú chén

Definitions (CC-CEDICT)
  1. make your day's plan early in the morning (idiom)
  2. early morning is the golden time of the day
Definitions (Wiktionary)
  1. proverb
    Early morning is the most precious period of time in a day; Make one's plan for the day in the early morning
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    一日之计在于晨。
    一日之計在於晨。
    yī rì zhī jì zài yú chén 。
    • Sleep off the problem.