18 thoughts on “Stretching It A Bit

  1. Professor Plum

    This year, the winter solstice occurs on the 22nd, not the 21st, of December.

    You’ll have to wait another day for the grand stretch so.

    1. Sam

      The evenings don’t start getting longer on the solstice. That happens before the winter solstice.
      The earliest sunset was on the 13th, and the sunrises continue to get later until the 30th (although it’s going to be about 3 minutes difference over the space of a week, so most people won’t notice). It’s just that since the solstice, the amount of time that one sunrise is later than the next, is less than the time that the sunset is earlier than the previous one, therefore the amount of daylight increases ever so slightly.

  2. joy personified

    Today (23rd) will be 5 seconds longer than yesterday. Yesterday (22nd) was 1 second shorter than the previous day (21st). There was no stretch.

      1. Sam

        and you’d be wrong.
        the 24 hr day is an average, and twice a year we disregard it.
        If you’re using that standard then the shortest day of the year is the day the clocks go forward, which is only 23 hours long, and October has a 25 hour day.

        If you go from solar noon to solar noon, then it varies a lot (see the Equation of Time)

        And if you go by sidereal days, then you’ll find it out of whack by almost 4 mins per day relative to your clocks, and of course you’ll end up with the middle of one of those days, at midnight 6 months later, but at least they are the same length.

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