It's the time of the year when days are getting shorter. While there is still light it becomes apparent when having a full day at the office. It wasn't still exactly dark when I left and there was still light left when I got back home, but not much. Soon it will be dark all the time outside of work.
The looming darkness made the day already feel shorter, most of it spent at office and commuting there. Getting back home I felt already drained, no energy to so anything else. Even though it's the same time than during the time with more daylight it just highlights how much time it takes to have an office day.
Good thing I don't have that many of those. Might need to minimize them suring the dark times to preserve the energy and still have some left after the work day to do something else as well.