2019-08-19 UTC
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[tantek] Aside: in all the years of date-time precision discussions, I have found exactly *one* that seems to imply a strong :00 seconds when only hours and minutes are provided, which is United "boarding ends" times. They literally close the doors at the time indicated with :00 seconds. Which kinda sucks because it means that if you get to the gate at the boarding ends time (during that minute), you'll likely be denied boarding.