Originally Posted by Big brother tv:
“It stayed bright to 7 but only just. It seems to get darker quicker now than in summer.
I guess we still have a long way to go before we've got 11pm daylight.”
We're now entering that time of year where the twilight period is at it's shortest. At both the Spring and Autumnal Equinox, the transition from day to night and vice versa is at it's quickest, whereas in the Summer it's at it's slowest (in fact, in England, on a clear night, in the middle of Summer, it may never seem to go completely dark. There may always appear to be some glow in the sky towards the northern horizon). This is because everywhere in the British Iles never gets "truly dark", astro twilight is the darkest it gets. Places further north such as Scotland and Northern Ireland get Nautical Twilight (dusk) and the sky may never go darker than a deep blue during the night.
At the Winter Solstice however the twilight period is a little longer than it is now, though not as long as during the summer.
I did this comparison of twilight lengths in different locations at different times of year using the timeanddate.com website.
Equinox (21st March/September)
London
Civil Twilight Length: 33 mins
Nautical Twilight Length: 40 mins
Total Twilight Length: 73 mins
My Location (Lancashire)
Civil Twilight Length: 35 mins
Nautical Twilight Length: 42 mins
Total Twilight Length: 77 mins
Londonderry
Civil Twilight Length: 36 mins
Nautical Twilight Length: 43 mins
Total Twilight Length: 79 mins
Winter Solstice
London
Civil Twilight Length: 40 mins
Nautical Twilight Length: 44 mins
Total Twilight Length: 84 mins
My Location (Lancashire)
Civil Twilight Length: 43 mins
Nautical Twilight Length: 46 mins
Total Twilight Length: 89 mins
Londonderry
Civil Twilight Length: 45 mins
Nautical Twilight Length: 48 mins
Total Twilight Length: 93 mins
Summer Solstice
London
Civil Twilight Length: 48 mins
Nautical Twilight Length: 1hr 15 mins
Total Twilight Length: 2hr 3 mins
My Location (Lancashire)
Civil Twilight Length: 54 mins
Nautical Twilight Length: 1hr 45 mins
Total Twilight Length: 2hr 29 mins
Londonderry
Civil Twilight Length: 58 mins
Nautical Twilight Length: -
Total Twilight Length: 6hr 38 mins!!