If a car is posted for several days, your webpage shows ‘Apr 3rd’ beside a small clock icon. Love that. However, if the car was posted last year in April, there is no mentioning of the year like ‘Apr 3rd '23’. Consequently, one does not know whether it was posted ‘Apr 3rd '24’ or ‘Apr 3rd '23’ or ‘Apr 3rd '22’ or …

Normally, cars are not posted that long, I know. Normally, you have several cars spread over several months making this obvious. However, I am just reporting, for example in this search https://www.autotempest.com/results?make=chevrolet&model=volt&localization=any&domesticonly=0&minyear=2013&maxyear=2013&exterior_color=gray&interior_color=beige only two cars get listed, one 19 days ago, one more a year ago.

Actually, the dealer software states it was posted 477 days ago:
https://www.carsforsale.com/vehicle/details/90915084