WASHINGTON — It’s one of the most coveted tickets in the nation’s capital, but you won’t need one to visit one of the most popular Smithsonian museums in September.

The National Museum of African American History and Culture is bringing back walk-up weekdays for the month of September.

Since opening in 2016, the museum has depended on visitors obtaining timed passes online before visiting. Some people have found themselves booking their tickets months before their visit in order to get in.

Walk-up weekdays are the museum’s way to gauge whether or not timed tickets are still necessary for admission. A similar ticket-free assessment was done in April and in May.

Since tickets are not being required in September, the museum warns that visitors may encounter long lines if the museum reaches maximum capacity.

Groups with more than 10 people will still need to obtain timed tickets from the museum or its website, and entry on the weekends will still require the use of timed tickets.