Yes it's safe to take expired aspirin and it will not harm you.
Taking expired aspirin is not harmful and is safe but when aspirin is expired the aspirin loses it's effectiveness.
So when you take expired aspirin it may not work on the pain or whatever you have as good as fresh non expired aspirin.
So you might need to take more than your normal dosage of the expired aspirin to get the results of fresh aspirin.
If you have expired aspirin it's better to throw it out and get fresh aspirin so that it works better on your ailments and pain.
But you can safely take the expired aspirin if you want too.
Even other expired medicines are safe to take but they are not as effective when the medicine is expired.