Hi There:
I have an interesting question. At the South Pole, there are times of year where the sun doesn’t come up at all, and other times of year where it never sets. If someone who observes Shabbat were stationed at a scientific base there, when should they observe Shabbat? Also, when would one pray?

Thank You

Hi there!

Your question is an interesting one!

Please refer to the star-k website with the attached link for a detailed explanation on this topic