I would say that this is a matter of perception. People have differ responses to differ situations.

I used to consider Monday to be boring because it meant I got to go to school again and have to face lecturers who had no joy. They were like evil task masters who took every opportunity to oppress us, their students.

I remember back in my fourth year, my penultimate at school. I dreaded Mondays because of one of my many sadistic lecturers. This one would always make sure everyone had a hard time. On the timetable, he was fixed for 8am but this man would make sure he came as early as 7 and most times would reschedule the class to begin by that 7am. He'd instruct that no one was to come in later than he did. His reason was that he being the lecturer ought to be the one coming late and not us, the students. He completely ignored the fact that he was the one that fixes the class for 7am and not us or the school authorities.

Everyone used to wish Monday delayed coming and we would be literally happy whenever we heard he was sick or had an appointment on Mondays.

Anyways, after school, Mondays are no longer living killjoys. I'm happy to begin the week with new energy to attack my week and ensure that my goals are achieved.

It's usually those who have to answer to someone that feel Mondays are boring.

Also, I think it's like that to people who have too much fun during the weekend and have to go back to theory normal lives at the beginning of the new week.

Overall, it's a perception thing.