Shortest day of the year:
Monday, December 21, 2020 (AKST)
Sunrise in Anchorage, AK 10:15 AM
Sunset in Anchorage, AK 3:42 PM
5 hours and 27 minutes of daylight
18 hours, 33 minutes of night
Monday, December 21, 2020 (HST)
Sunrise in Honolulu, 7:05 AM
Sunset in Honolulu, 5:55 PM
10 hours and 50 minutes of daylight
13 hours, 10 minutes of night
+++++++++++++++++++++++++++++++++++++
So this location in N.HI has 5 hours and 33 minutes more of daylight than S.AK on the shortest day of the year.
It's the other way around on June 21, with longer days by this same amount in AK....flip flopping night/day from December 21.
Locations close to the equator don't have much change in daylight/nighttime hours all year round.
North of the Arctic Circle, there are some days with no daylight and some with no night.............the sun just dips to the horizon, then circles back higher.
I have a sister thats been living in Anchorage for over 35 years that is flying to Hawaii this week(where her and her husband go every Winter) and gave her the information on the previous post.
https://en.wikipedia.org/wiki/Sunrise_equation
The sunrise equation can be used to derive the time of sunrise and sunset for any solar declination and latitude in terms of local solar time when sunrise and sunset actually occur. It is:
where:
is the hour angle at either sunrise (when negative value is taken) or sunset (when positive value is taken);
A contour plot of the hours of daylight as a function of latitude and day of the year, using the most accurate models described in this article. It can be seen that the area of constant day and constant night reach up to the polar circles (here labeled "Anta. c." and "Arct. c."), which is a consequence of the earth's inclination.We go to Detroit every year during Christmas week, from Evansville IN.
On March 21, and Sept 21, everybody has 12 hours of day and night. Then, the disparity grows for 3 months.
For fun, I'm doing the difference between EVV and DTW.
7:58 AM Monday, December 21, 2020 (EST) Sunrise in Detroit, MI 5:03 PM Monday, December 21, 2020 (EST) Sunset in Detroit, MI
9 hours and 5 minutes of day.
7:03 AM Monday, December 21, 2020 (CST) Sunrise in Evansville, IN 4:35 PM Monday, December 21, 2020 (CST)Sunset in Evansville, IN
9 hours and 32 minutes of day
So 27 minutes more daylight down here and we are around around 300 miles due south(180 miles west). This would be like 9 minutes/100 miles for places like this in the middle latitudes. It WILL BE less as you go south and more as you go north.
The disparity in day/night really amplifies fast/exponentially as you get farther north.