宵旰

xiāo-gàn

[getting up before dawn and eating late --busy with state affairs; labor incessantly on duty] [方]∶宵衣旰食, 即天不亮就穿衣起床, 天晚了才吃饭歇息

宵旰忧虞轸。 --唐·杜甫《秋日夔府咏怀一百韵》