I don't remember the details but it's actually just as easy. They're called unequal hours, Babylonian hours or Italic hours. More precisely the difference betw

I don't remember the details but it's actually just as easy. They're called unequal hours, Babylonian hours or Italic hours. More precisely the difference between two sunrises or two sunsets was 24 hours, so the hours were longer in winter and spring as days get longer, and shorter in summer and fall as days get shorter.