When I lived in northern England in the summer it would get light around 4 o clock in the morning and stay light until 11 pm. That's about 19 hours of daylight.
AI: “The length of a sun day in summer is primarily defined by latitude; the tilt of the Earth's axis relative to the sun, which varies based on your latitude, determines how much daylight you receive, making higher latitudes experience longer days during summer.”
I remember my trip to St. Petersburg in summer of 2013, during the white nights, here is how it felt:
“During the White Nights in St. Petersburg, Russia, the days are about 19 hourslong on average. The sun doesn't set until after 10 PM, and the twilight lasts almost all night. The sky is never completely dark, and the sun rises around 2 AM.
The White Nights occur every year from late May to mid-July in places near the Arctic Circle. St. Petersburg is located at 59 degrees 57' North, which is a high latitude where the sun doesn't descend far enough below the horizon for the sky to get dark.”
In Iceland end of May, “at the end of the month, sunrise comes at 3.25 am with sunset at 23:37, giving more than
20 daylight hours“.
Northern Latitudes, close to Arctic. I am talking about the length of the sun day.
Longitude is E-W, so technically, the sun should rise earlier in Eastern longitude’s but the total length of sunshine exposure depends on the latitude. Maybe we are asking for different things? Me - for longer sunny day, you - for the sun to get up earlier, or later?