Riding off into the sunset

Ok, that's a sunset.
Does that mean I can go to bed?
If I go to bed then it will be tomorrow sooner.
If it is tomorrow I can go and get my PUPPY!!!

Although its almost dark I have just waved my daughter and my friends off across the fen for a ride. They have plenty of hi-viz. I should have given them head torches so I can spot them!