The wait list has opened for the sixth edition of Diner en Blanc, the Parisian-style pop-up picnic that for one evening transforms a secret location into a sea of partiers dressed in white.

Not only is the location being held close to the vest, as is custom. The date, so far, is also a secret. In previous years, it has been held on the third Thursday in August.

Cohosts Natanya DiBona and Kayli Moran will throw a free preview party Tuesday, June 6 from 5 to 7 p.m. at the Headhouse Square Shambles, on Second Street near Lombard. The party will feature voting in the annual table-decorating contest (theme is Historic Philadelphia: Events That Shaped Our City), as well as details for getting into the registration lottery - a process only slightly more complicated than vertex operator algebras.

You can get onto the waitlist here. The wait list does not guarantee a spot; rather, it ensures that those signed up to the wait list will be notified when Phase 3 goes on sale in early summer through a lottery system. Last year's registered members will automatically receive notice of registration going on sale in Phase 1.

Registration for June 6's preview party is required via bit.ly/debphl17preview.

Past locations in Philadelphia were Logan Circle (2012), JFK Bridge (2013), Avenue of the Arts (2014), the Navy Yard (2015) and outside the Philadelphia Museum of Art (2016).