please empty your brain below

Comments about changing the clocks, rather than sunset, are being diverted over here.
(and comments about twilight over here)
Oct 29th - Jan 30th up here in Orkney - almost 13 weeks. Come Dec 17th, sunrise is after 9am and sets at 3.14pm. On a cloudy day, it can be a bit dim to say the least.
What an amazing coincidence - serendipity at its finest - let me explain.

Late yesterday afternoon, I was bumped into by someone in my local shop who is a friend of a friend. He is in the property business and I invited him to see our completed house extension asap, fulfilling an outstanding promise.

So, at just after 5:00pm, I was calculating what the latest was I could leave work each day next week that he could come around and view the external features, before the increasing gloom of dusk descended into darkness.

Thus, today's post is both highly informative as well as being most helpful. Once again, thank you DG.
It's amazing how even just 50 miles north to Cambridge make a fair bit of a difference- we hit "Closer to 4pm" a few days ago (the 1st, Sunset was 1630). Of course, we're not just a little further north, but the Greenwich Meridian lies about 6 miles to the west of the city. Kirkwall in Orkney however is almost 3°W, making sunrise and sunset a little later even before taking into account latitude. The nearest equivalent place at roughly the same latitude as London and longitude as Kirkwall would seem to be in the Bristol Channel, with Newport in Wales the nearest town of note.
What does the pattern look like if you do it all in GMT and ignore the pretence of BST?

I remember being astounded when I first moved from the Sussex coast to Huddersfield at how much less daylight I was getting in the winter.
It's the dark mornings I can't cope with. Even though the clocks change in October and make mornings brighter, it's never long before I'm getting up in the dark again.
My brain refuses to accept that Orkney is directly North of Newport - I think my mental map of the UK must assume the A1 goes directly North...
I went to Singapore once and the difference between sunset in summer and sunset in winter is - ten minutes!
Given that the result seems to be to lessen the variation in the time of sunrise, going back and forward TWO hours would be twice as effective. We could have sunrise always nearest to 6 - 8, and sunset 4 - 10.

dg writes: Sunset yes, 4-10.
Sunrise 6-8, plus a week of 9.

For all its size, China has just the one time zone, so waking up in Xinjiang (where mere survival's an end in itself if current stories are to be believed) is different from Hainan.
London's earliest sunset is at 3.51pm, and the latest at 9.21pm.

This is how slowly sunset times change in December and June...

Before 4pm  36 days 
  After 9.15pm  31 days 

Singapore really is bizarre with so little differential in sunrise and sunset. Having been there a few times it is a bit disconcerting, as a Brit, to see no difference in daylength regardless of when you visit. I dare say you get used to it along with the hardly ever changing weather (apart from monsoon seasons) across the year but with plenty of variety each day.

I love the detail DG goes into with his regular daylength tweets and posts. They usually bring a sense of impending gloom as we descend into ever less daylight and more cold. As I'm fickle I like the longer lighter days but searing Summer temperatures are unbearable. I'm hard to please!
Leo: the classic "no wait that can't be true" one about the angle of the British isles is that Edinburgh is to the west of Carlisle (it is also north of Moscow)










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