From my translation of chapter 6 of Pirkei d'Rebbi Eliezer:
And in 366 degrees (not 360), the Sun goes up and down, 183 it goes up in the East, and 183 it goes down in the West, corresponding to the days of the solar year. And in 366 windows, the Sun goes out, and it comes in the East, 91 days on the southern end, and 91 days on the northern end, and 1 window in the middle called the Nogah window. In Tekufat Tishrei, it (the sun) starts from the Nogah window and goes around to the southern end, window after window, until it arrives in the Shabbtai window. In Tekufat Tevet, it starts from the Shabbtai window and goes around and returns back, window after window, until it arrives to the Taalumah window, from where the light goes out, as it says, "And Taalumah brings out light" (Iyov, 28:11). In Tekufat Nisan, it starts from the Taalumah window, from where the light goes out, and it goes to the northern side, window after window, until it arrives in the Naamon window. In Tekufat Tamuz it starts from the Naamon window and goes around and returns back, window by window, until it reaches the Cheder window, from where the storm wind (ruach sufah) goes, as it says (I'm not going to translate the pasuk, but its Iyov 37:9).
In those [windows] that are in the East, it would go out, and correspondingly in the West, it comes in, and the Shechinah is always in the West. It comes in and prostrates itself before HaKadosh Baruch Hu, and says before Him, "Master of the Universe, I did all that you commanded of me".
The window in the middle of the Firmament, its name is Mezarim, and it (the sun) doesn't go out and enter in it aside from one time in the great cycle, that through (the window), it goes out on the day that it was created, in the night, in the west.
החלון שבאמצע הרקיע, שמו מזרים, ואינו יוצא ונכנס בו אלא פעם אחת של מחזור גדול, שבו יוצא ביום שנברא בלילה במערב