How long is the application of a driving license valid?
From the limited information you've given (basically none!) is impossible to say. It will depend on who issued the licence, and possibly also on the exact type of licence, maybe also when it was issued. For example, here in the UK, when I passed my driving test 40+ years ago, the licence i got would have been valid until I reached my 70th birthday. If I hadn't changed address several times since then, that licence would still be valid now! But the newer type of licence, that I received after notifying a change of address, is only valid for 10 years at a time and must be renewed when the 10 years expires. And once I reach 70 it will be valid for only 3 years at a time. Other countries, and in some countries different provinces/territories/states, will have different rules on licence expiry. Check the actual licence, I would be surprised if the expiry date isn't displayed on it