Two October or not two october?

Hello, all odd shapes pieces of salami, today our joke thing was that every hour, 8:00, 9:00, 10:00, and so on, we would say the word blue. At 8:00, I wasn't at school yet, at 9:00 we were in the hallway, where there is no clock, so we didn't say it. at 10:00 It worked perfectly. The whole class said "blue." at 11:00 we said it at about 11:30. At 12:00 most of us said it. At 1:00 we forgot, and at 2:00 we were taking a test. The end?

Cleo,
The thing