Sunscreens are required by the Food and Drug Administration to remain at their original strengths for at least three years. This means that you can use leftover sunscreen from one year to the next. Some sunscreens include an expiration date — a date indicating when they're no longer effective (mayoclinc.org)
The sunscreen found on sale in this tab has an upcoming expiration date. These would be best to use right away for a great price.