Some things are predictable.
Like this Monday morning, all travel providers (to Bandung) in my city for morning travel are most likely to be full-booked. Long weekend, more people go home. Tickets are selling fast. With that prediction, we need to book our seat earlier than usual or we won’t get a seat in a desirable schedule.
If you know you need to go to Bandung from my city, Bekasi, for work and arrive there before 10 a.m., then travel schedule after 6 a.m. won’t work. Knowing that, I can book a seat in last Monday when other people have not made their booking yet.