[OC] 我制作的显示不同纬度地区一年中日出和日落变化的循环日历

[OC] 我制作的显示不同纬度地区一年中日出和日落变化的循环日历

[OC] Circular calendar I made showing how sunrise and sunset change throughout the year at different latitudes
from /r/dataisbeautiful