Can I use Vitamin C serum during the day?

Hello. It feels like it suddenly got much hotter after a brief rain shower. Now, I feel stuffy without air conditioning, and it has started to get muggy. I am already worried about the sweltering heat of summer. I am very concerned that along with the heat, freckles and blemishes will appear on my face when summer comes. I hear that Vitamin C is good, but I also hear that it can be harmful if it interacts with sunlight. Even though I apply sunscreen, I am still worried, so I am really curious if everyone applies Vitamin C during the day. I heard that applying it during the day is best for its antioxidant effects, but I also feel like my makeup tends to smudge a bit, so I'm not sure how to apply it properly. Also, please recommend other ingredients that pair well with Vitamin C.