The best time to sell prom dresses on Ebay is from January 6 through May 19. Interest in prom dresses starts after the new year and continues until the actual event. In the US, Prom usually happens in April, May, or June - near the end of the school year.
We get this information on prom dresses from Google search result data. The above graph shows when people are searching the phrase “Ebay prom dresses”.
There is some minor Ebay demand for prom dresses at other times of the year, so if you want to clean out your closet now, you could definitely try listing it, even if it’s outside the January 6-May 19 timeframe.
We also have info on the best time of year to sell other things on Ebay, too.