earthmomma,

It must be scary and frustrating as hell! I'm so sorry this happens to you. Does it happen out of the blue or after a stressful event?

Have you had a neurological workup done? Have you discussed this with your psychiatrist or primary care physician? I think it warrants a visit to the doctors just to rule other things out.

To forget what season it is outside does not sound dissociative to me, not even for dissociative amnesia.