Deja Vu at Stanley Park

Most of my deja vu's have been from dreams I've had anywhere between 3months before to a couple of years before. Today's was probably the most closest period of difference I have noticed. I experienced a deja vu walking towards the ice cream shop at Prospect Point in Stanley Park. The moment that struck me was when I was thinking of going down to the shops to buy some ice cream.
I think I had this dream/memory about 3-4 days ago. I'm still trying to determine if I'm crazy or not, and if I can really dream into my future. The concept sounds absurd, in a rational mind of though. But.... you never know, right?