I wear sunscreen every day but don't reapply during the winter. Windows don't generally protect you from UVA rays so even if you're inside all day, better safe than sorry :) I have tried sooo many sunscreens to find one that feels good & doesn't burn my eyes, my favorites are the Avene Solaire, Australian gold tinted sunscreen, Biore UV, and the trader joes one that has been mentioned a few times.

I will admit that it can feel silly putting on sunscreen when I haven't seen the sun in days if not weeks... but I use tret & get eczema so I figure I need the added protection.