When the rest of us on this side of the world (or at least, Europe) sleep, Donald Trump is still working away like a busy beaver.
This is partly because of the time difference of five hours between London and Washington D.C., partly because he's the elected President of the United States - a job where you're guaranteed to get very little sleep.
But this is the time when the president tends to go online and post his thoughts on Twitter, and he's renowned for not holding back on the network.
Certainly, with the latest batch of overnight tweets, we got a blast from the past with another attack on Obamacare and the promise to repeal the health system.
And - perhaps not so unexpectedly - there was no direct reference to the departure of former national security advisor Michael Flynn, which continues to dominate news headlines around the world, only an implied reference with a familiar outcry of 'fake news'.
Check it out below: