In fahrenheit 451 how does bradbury indicate that a week has passed

In fahrenheit 451, Bradbury indicate that a week has passed because he counts the days that passed and makes a space in between the paragraph and the paragraph before it. The numerals 451 represent the degree at which books burn. So the asnwer in this question is that bradbury counts the days that passed and makes a space in between the paragraph and the paragraph before it.

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11