burn the candle at both ends
burn the midnight oil
be on nights
nightwork
lychnobite
grafter
night shift
worknight
nightshifter
beaver away
graveyard shift
sweat
noctidial
beaver
graft
slave
evening shift
nose to the grindstone
roost
nighthawking
yakka
paynight
hustle
tool
work like a dog
sweat blood
day shift
day labourer
work like a Trojan
day laborer
day watch
slave away
sweat one's guts out
slug away
daysman
darg
nine to five
9 to 5
moil
work like a mule
go ham
swing shift
workless
slam
sunlight
work like a horse
moonlight
nyctophilic
be on days
elucubrate