It's a holdover from before mechanical clocks. Unless you went to the bother of making a sun-clock, about the most precision you could get was 15-30 minutes for something like "at noon," "at sunset," "at suppertime," or "when Big Rock's shadow points at Little Rock." And that's the typical timespan of arrival even now.
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Re: *laugh*
Date: 2021-05-02 02:57 am (UTC)