Snap the package — and the harvest or best-by date if it's on another side. Freshie reads what's printed and tells you how fresh it is and how to brew it.
Try Live ScanBETA— point at the shelf, the inventory builds itself
Front of the package
Where the date is printed
Add either or both — two photos give the most accurate read.
Green and lightly oxidized teas fade fastest — a harvest date matters most there. Well-stored oolongs, blacks, and pu-erh keep far longer.