The last sunrise and sunset until February happened this week. Now the sun is up all the time here. Sleeping is easy though. The dorm room has a very good black out curtain, so we go instantantly from day to night.
It also helps sleeping that my job is very physical. The only way to get around is walking. My boots are huge insulated steel-toed things. The surfaces are snow-covered, sprinkled with cinders for traction. Just walking is a lot of work. The cold is a drain, too.