Sunscreen in the office?

Hi. We are advised to wear sunscreen during the day. When I arrive to work it is dark (06:30). I am inside all day and drive home with minimal direct sun I my face. We still need some vitamin D right? On these days is sunscreen really warranted/necessary? Would the active ingredient still be viable at, for example, 4pm? I believe I have mild rhinophyma and rosacea.

No doctor answers yet