Brian Brettschneider on Twitter: "Sunrise and sunset on the summer solstice using local time. 🌞 #SummerSolstice https://t.co/wLurN1nEAR" / Twitter
Is there a tool that can calculate the time of sunrise? - Quora
WRCC 在Twitter: "Tomorrow is the longest day of the year in the n. hemisphere. These maps show the sunrise, sunset and hours of daylight. #SummerSolstice https://t.co/YQ1MKYC7ev" / Twitter
RADIO-TIMETRAVELLER: The New NOAA Solar Calculator