grand stretch in the evenings

magicbastarder

good news for cyclists - and anyone who's not a vampire, i suppose - the evenings have started getting longer again. summer is just around the corner.

Tabnabs

au contraire mon frère, you're 8 days early

https://www.timeanddate.com/sun/ireland/dublin

magicbastarder

i'm not. yesterday was the earliest sunset, it's clearly stated on the link you provided.

buffalo

Tabnabs wrote: »

au contraire mon frère, you're 8 days early

https://www.timeanddate.com/sun/ireland/dublin

Your link shows the OP is right:

Second time is sunset - it's getting later (though so is sunrise):

14 08:34 ↑ (130°) 16:06 ↑
15 08:34 ↑ (130°) 16:06 ↑
16 08:35 ↑ (130°) 16:07 ↑

Tabnabs

Column number 5 day length difference.

JazzyJ

Tabnabs wrote: »

au contraire mon frère, you're 8 days early

https://www.timeanddate.com/sun/ireland/dublin

I never get why the spring clock change is so late. They could easily move it forward to some time in late February. You'ld have a similar sunrise to right before the winter change, and an extra hour of sunlight in the evenings.

magicbastarder

magicbastarder wrote: »

good news for cyclists - and anyone who's not a vampire, i suppose - the evenings have started getting longer again. summer is just around the corner.

pitch dark morning and evening these days..... inky blackness.
The shortest day is 21 Dec traditionally. After that you can actually see a slight difference (well... coming into January). Not on the 15th December!

I will go with tradition and a lifetime of experience on this one.

JMcL

So it is, weird. 21st is still shortest day.

Now, I know it's not Friday yet, but there's got to be somebody on here with a better knowledge of geophysics than me that can say why, or failing that at least speculate wildly :-)

magicbastarder

it's to do with the leap year, afaik - midnight doesn't happen at exact celestial midnight, so the day is not 'centred' exactly on noon/midnight.

magicbastarder

JazzyJ wrote: »

I never get why the spring clock change is so late. They could easily move it forward to some time in late February. You'ld have a similar sunrise to right before the winter change, and an extra hour of sunlight in the evenings.

yeah, it's an odd one. spring forward happens around the spring equinox, but fall back happens a month after the autumn equinox.

Tabnabs

Deleted User wrote: »

pitch dark morning and evening these days..... inky blackness.
The shortest day is 21 Dec traditionally. After that you can actually see a slight difference (well... coming into January). Not on the 15th December!

I will go with tradition and a lifetime of experience on this one.

"Traditionally" or because science proves it?

tomasrojo

Given how overcast it is today, I laughed when I saw the title of this thread.

I agree that the date of the switch to Summer Time should be changed. My aunt is a long-time proponent of JazzyJ's proposal.

Tabnabs

magicbastarder wrote: »

it's to do with the leap year, afaik - midnight doesn't happen at exact celestial midnight, so the day is not 'centred' exactly on noon/midnight.

Celestial what now?

buffalo

Tabnabs wrote: »

"Traditionally" or because science proves it?

I think you're missing the nuance here. The 21st December is the shortest day (i.e. least amount of daylight), but not the one with the shortest evening (i.e. least daylight after noon).

edit: scroll to the bottom of your link:

Earliest sunset is on 13 December. Latest sunrise is on 29 December.

Tabnabs

buffalo wrote: »

I think you're missing the nuance here. The 21st December is the shortest day (i.e. least amount of daylight), but not the one with the shortest evening (i.e. least daylight after noon).

edit: scroll to the bottom of your link:

And yet, this table says it's not til the 17th.

http://www.sunrise-and-sunset.com/en/sun/ireland/dublin/2016/december

As it does here also http://www.sunrisesunset.com/predefined.asp (when you enter details for Dublin, for example)

For all practical reasons and to remove any nuances from the equation, I'll stick to the 22nd to celebrate the suns northern migration and the lengthening of the days

magicbastarder

You need to make your mind up about your sources.

buffalo

Tabnabs wrote: »

And yet, this table says it's not til the 17th.

http://www.sunrise-and-sunset.com/en/sun/ireland/dublin/2016/december

umm... the table says that on the 17th the sunset will move into a later minute, not that it's the first time sunset is later. If there were seconds shown on the time, it might be clearer.

You'll notice for example, on the 14th evening astronomical twilight ends at 18:15, but on the 15th it ends at 18:16:

http://www.sunrise-and-sunset.com/en/sun/ireland/dublin/2016/december/14
http://www.sunrise-and-sunset.com/en/sun/ireland/dublin/2016/december/15

buffalo

I love arguing on the Internet, I discover the most fascinating things. I've already spent far too long learning about civil vs nautical vs astronomical twilight.

nialljf

cycling?

wanderer 22

nialljf wrote: »

cycling?

You'll want the Motors forum for that.

magicbastarder

Tabnabs wrote: »

"Traditionally" or because science proves it?

the solstice is usually, but not always, on the 21st. often on the 22nd too; for example, last year.

pillphil

Tabnabs wrote: »

"Traditionally" or because science proves it?

Actually, science says Dec 22nd is around the longest day of the year. :P

Pinch Flat

Oops sorry, thought this was the cycling forum. ***closes door quietly***

magicbastarder

how many times do you need to close a door before it becomes noisy?

magicbastarder

anyway, if you think we have it bad here - sunset in london is about 15 or 20 minutes earlier in london. so it sets before 4 this time of year. swings and roundabouts, they get brighter mornings.

Pinch Flat

magicbastarder wrote: »

how many times do you need to close a door before it becomes noisy?

If a door closes when no ones there, does it make a noise?

fat bloke

It certainly highlights the relativity of time. Reading this thread has been the longest 30 seconds of my life.

magicbastarder

since time passes more quickly the older you get, that may be a sign that you're just getting old.

sy

http://earthsky.org/earth/everything-you-need-to-know-december-solstice ...some reading on your turbo

fat bloke

magicbastarder wrote: »

since time passes more quickly the older you get, that may be a sign that you're just getting old.

It has aged me. Of that there is no doubt.

Ciaran_B

Was I imagining it or was it a lot brighter this morning? Might have been the clear sky and super moon.