I wouldn't be confusing this with early rising, despite the fact that the author has.

If you wake up at 2PM, but first duties are expected from you at 4PM, then you by all means are an early riser -- in the respect of your own day schedule.

Time doesn't exist. Time is just a way of how we humans learnt to include the concept of movement of objects in space, into our non-linear memory, so that we can use it in reasoning. (Earth has rotated by 180 degrees - now who said it took "12" "hours" and where exactly can these "12 hours" be found, tangibly? In our head only, and non tangibly. That is, if every human on earth lost their memory in this very second, those "12 hours" would stop to exist entirely, until a similar interpretation of Earth's rotation would be devised again.)

Good morning from GMT+2 btw.

Even i find working at night very convenient. There is no one to distract you and also you get so many ideas when you think in complete silence. Some people work best in the morning , some at night . Guess everyone have their own way of working.