Don't use expired sunscreen even if it looks fine.

No, I wouldn’t. Sunscreen isn’t like a can of soup where “best by” is a suggestion. The active ingredients degrade over time, even if the lotion hasn’t curdled or changed smell.

The UV filters break down chemically. That SPF 30 might actually be SPF 10 (or less) after a year past the date. You won’t know until you’re lobster red and peeling. Smell and texture are not reliable indicators of protection.

Sunscreen is cheap. Skin cancer is not. Toss it and buy a new bottle. Your future self will be grateful.