Hello are you a night owl? Someone who stays up later than midnight?
Hi. Sometimes I am. Depends. 
They feel more energetic in the evenings before sleep. I sometimes experience this as well.
Do many people suffer from it?
A lot of people would consider themselves night owls. They often have trouble performing at work the following day. Have you experienced this?
Yes, I have, many times.
Night owl (person)
A night owl, evening person or simply owl, is a person who tends to stay up until late at night, or the early hours of the morning. Night owls who are involuntarily unable to fall asleep for several hours after a normal time may have delayed sleep phase syndrome. 
The opposite of a night owl is an early bird – a lark as opposed to an owl – which is someone who tends to begin sleeping at a time that is considered early and also wakes early.
. They feel most alert and say they function best and are most creative in the evening and at night. People with DSPD cannot simply force themselves to sleep early. They may toss and turn for hours in bed, and sometimes not sleep at all, before reporting to work or school. Less-extreme and more-flexible night owls are within the normal chronotype spectrum.
By the time those who have DSPD seek medical help, they usually have tried many times to change their sleeping schedule. Failed tactics to