Short lapses that are totally blank can be a sign of mini strokes or carotid artery becoming blocked. If blocked on one side the body will attempt to route blood from the other side across the brain, pretty amazing. Total blank is something to see a doctor about.
Not recalling where the car keys are is "normal" having the car keys and not recalling what they are or what they are for is not normal and warrants a trip to the doctor.
If you were busy doing other things the days sort of blurring together is normal. Who else recalls as a kid discovering that summer break from school was almost over in mid August with no recollection of where summer went? Or all the activities on a 10 day trip but no idea of what happened on which day. Or even part way through the trip trying to recall what day you were at a particular place? Suddenly realizing as you put the timeline together that it was a week ago you were at that diner.