The same thing happens with my car, if I've parked it in a lot I've used more than, oh, three or four times.
I know my temporal memory is bad, but I'm not sure whether it's unusually bad. Let's find out!
If someone asked you, right now, "What were you doing on the night of January 4th?" would you be able to answer them?
If January 4th is special, would you be able to say what you were doing on a typical randomly-selected date in the past 3-5 weeks?
Do you remember what you had for breakfast this morning?
Do you usually remember where you've left your vehicle in a familiar parking lot (or other community storage area)?