Ways to say you are studying or working overnight

Nowadays, in many cities in the world, there are round-the clock spots which cater to our crazy schedules. We can do laundry, get a late-night haircut or a slice of pizza, go out to Starbucks to grab a cup of coffee, or go to gym. Are you a night owl, who is stydying or working overnight tonight, here are some expressions for you:

• I’m working the graveyard shift.
• I’m burning the midnight oil.
• I’m working till the small hours.
• I’ll have to pull the all-nighter.