That may be, but j.goor is testing to see if the hour is greater than 12. If the hour is greater than 12, it's either 1:00pm or 1300, which is just about a full hour past the AM/PM meridian.
If the script is using $hour to mean hours and decimal hours, that sort of thing is not obvious in the snippet provided. What it says is that it is looking at hours.
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