On paper YES! 

The expiry date is mentioned on every perfume you will buy, but the expiry of the perfume comes down to the way you store the perfume, away from the sunlight, right next to sunlight, in a cold and dry space, everything plays an important role in this process.

In most cases, the perfume is supposed to age and become better with time, and this happens in most cases. The fragrance changes a little but just to become better, perform better and smell better, that to if kept in cold and dry place away from sunlight.

Most discontinued perfumes have gone past their expiry date, but these are the perfumes loved by Perfume Enthusiasts and they go for more than their retail price depending on the perfume and it's age. These perfumes have actually aged, and turned out to better with time.

Perfumes are just oils mixed alcohol and as it is with alcohol, the older it gets the better it gets, the same is with perfumes. Believe it or not a perfume has more alcohol than a bottle of Johnnie Walker.

So, there is no harm in using a perfume which has aged past it's expiry date.