To start work early in the morning and continue late into the night; to work hard from dawn to dusk.
起得早，睡得晚。形容辛勤劳动。
周立波《暴风骤雨》第一部九‘头年给你干一整年活，冲风冒雨，起早贪黑的。’郭全海说，气急眼了。”
She worked qǐ zǎo tān hēi to finish the project on time.
Learn the next connected idiom: 起早贪黑 (qǐ zǎo tān hēi) → 黑灯瞎火 (hēi dēng xiā huǒ)
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