Mom always used to want everyone home before dark – as though anything was out there at night that wasn't there during the day.
Maybe I can get back before dark.
I can be up and back before dark.
I'd better get going if I want to make it back before dark.
The plan of the allies was to attack Napoleon's right, and to cut him off from Vienna, and their advanced guard began, before dark on the 1st of December, to skirmish towards Telnitz.