Neil_Boekend wrote:Smaller steps would be better, so four steps is better than one. But for daily life I feel it is about as important as sidereal time.
Ultimately, the prior suggesting of setting Dawn as 'zero hour', throughout the year (or, for compatibility with current timekeeping practices, perhaps 6am1
) would be even more
gradual and natural.
So, we end up with LocalTime=UTC+fn(latitude,longitude,dayOfYear)
- for function fn
that I won't bother to write (and might also require a parameter relating to which point in the 28,000 year precession cycle you are!) with the reference location being either your very own specific location or whichever designated national(/regional) reference spot you intend to subscribe to.
And a sidereal version could be made, too, even if you're not too hot on it.
I had also been told, by those who had been around when British Summer Time was first proposed/used, that some strong voices against the implementation of our particular DST were (or were speaking 'on behalf of') dairy farmers who were concerned that the cows would get confused about what time their morning milking would be... Of course the cows would not
be confused, they'd take their cue (as with the rest of the natural world) from the breaking of dawn and probably even then mostly by the 'general feeling' that they were to be milked, and it's always traditionally been the farmer's job to roughly match this dawn-based schedule, regardless of what timezone his human-world clocks happen to synchronise with.
I think it was said that the arguments were also re
used in arguing against the WW2 adjustments to UK clocks (BDST/British Double Summer Time, and GMT+1 in winter) and other deviations from the previously established patterns (the Wilson government), on the basis that the cows (apparently
used to the existing clock-switching from the previous years) would be confused by the change
of the changes... Again, doesn't seem particularly well-thought-out. (And, again, I doubt any practical farmer ever thought too much about the issue.)
(And just because I'm thinking up ways of 'fixing' the situation, it doesn't mean I consider it to be 'broke' at the moment. Thought exercises only!)1
Is midnight now strictly 18 hours afterwards? Is midnight strictly 6 hours beforehand? Or perhaps it's the midway between the two as the movement of dawn throughout the year drags each dawn-day a different rate across whichever (idealised) noon-day format you prefer. Hmmm... dawn's movement most quickens (second derivative?) towards the equinoxes (equinii?), to increase the disjoint between day-interfaces, and slows again towards each solstii. But in one half of the year the lengthening day with a yet longer day(/earlier absolute-dawn) afterwards would force an overlap and thus <24hrs each day, howsoever marked at start and end, and in the other half of the year the dragged-down day-length would feature the prior day's day-edge limits retreating from each other, to create >24hrs. Add in the minor eccentricity, thus changing rotational velocity, of Earth in its solar orbit and it might be more complex, yet, with up to four
intersections (the two solstii, and two other 'reverse gradient' locations quite close to whichever solstice is 'overshot'?) where days are
24 hours, or at least the closest transitioning point in the immediate neighbourhood). And I'm also a bit unsure as to what the precise behaviour would be within the equatorial band within the Tropics, or (beyond the obvious, of course) past the Arctic/Antarctic circles.