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Oh yeah, I never even thought about latitudinal time zones! It could be a checkerboard. Or maybe we need diagonal stripes and not vertical stripes. Now I need t

by dahart 6y ago

Oh yeah, I never even thought about latitudinal time zones! It could be a checkerboard. Or maybe we need diagonal stripes and not vertical stripes. Now I need to plot the isolines of sunrise on the globe... looks like I'm not getting anything done today... thanks! ;) Or I guess we could entrust the Google cloud to keep time and sync all the calendars. 12 hours of sun is a crazy idea, now that's some time smear. It'd be funny to try that in Iceland or Svalbard, where you'd end up with days where 12 hours are divided into 10 minutes... or worse, some days with no hours at all!

dmurray 6y ago
> Now I need to plot the isolines of sunrise on the globe... looks like I'm not getting anything done today... thanks! ;) You can try different times on this page, for one: https://www.timeanddate.com/worldclock/sunearth.html https://www.timeanddate.com/worldclock/sunearth.html
- dahart 6y ago
  Yes! There they are, the diagonal time zones. I don't know why I didn't check there. This website is so amazingly good, I keep referencing the interactive annual sunrise/sunset charts at different locations, just didn't think to check the world map. For some reason I feel like maybe the pastel colors and cartoony graphics make me frequently under-estimate how serious and thorough the charts and apps are here, but I am a big fan. Maybe time to donate.
Someone 6y ago
“Isolines of sunrise on the globe” don’t exist/change with time of year. It’s more like there’s a “sunrise line” that runs around the globe, changing slowly with a one year period (ignoring lots of smaller effects) If you really want to complicate things, a real “7 ‘o clock at local sunrise” clock should also be affected by local mountains. If you really, really want to complicate things, include cloud cover, too, an require that sunrise must be observed (Muslims require that for the new moon to determine the end of Ramadan (https://en.wikipedia.org/wiki/Ramadan#Eid https://en.wikipedia.org/wiki/Ramadan#Eid))
- dahart 6y ago
  Huh? The sunrise line is what I was talking about. The rest of that is hilarious. I have no interest to complicate things in those ways, but if you think those are good ideas, you should go for it! Propose them to your local government and try to get them to switch.

by dahart 6y ago

dmurray 6y ago

> Now I need to plot the isolines of sunrise on the globe... looks like I'm not getting anything done today... thanks! ;) You can try different times on this page, for one: https://www.timeanddate.com/worldclock/sunearth.html https://www.timeanddate.com/worldclock/sunearth.html

dahart 6y ago
Yes! There they are, the diagonal time zones. I don't know why I didn't check there. This website is so amazingly good, I keep referencing the interactive annual sunrise/sunset charts at different locations, just didn't think to check the world map. For some reason I feel like maybe the pastel colors and cartoony graphics make me frequently under-estimate how serious and thorough the charts and apps are here, but I am a big fan. Maybe time to donate.

Someone 6y ago

“Isolines of sunrise on the globe” don’t exist/change with time of year. It’s more like there’s a “sunrise line” that runs around the globe, changing slowly with a one year period (ignoring lots of smaller effects) If you really want to complicate things, a real “7 ‘o clock at local sunrise” clock should also be affected by local mountains. If you really, really want to complicate things, include cloud cover, too, an require that sunrise must be observed (Muslims require that for the new moon to determine the end of Ramadan (https://en.wikipedia.org/wiki/Ramadan#Eid https://en.wikipedia.org/wiki/Ramadan#Eid))

dahart 6y ago
Huh? The sunrise line is what I was talking about. The rest of that is hilarious. I have no interest to complicate things in those ways, but if you think those are good ideas, you should go for it! Propose them to your local government and try to get them to switch.