Archives, shown here performing at Patty Boom Boom, will appear on a much bigger stage Friday night. (Photo by John Shore)

But you will need to get your free tickets to be there, and tickets for this concert will go fast. Trust us. There are two ways to get tickets, and we recommend getting them early or risk missing out:

Pick them up at The Washington Post, 1150 15th St. NW, beginning at 8:30 a.m. on Friday, or swing by the Carter Barron box office, 16th Street and Colorado Avenue NW, beginning at noon. Tickets go fast and are limited to four per adult.

There are no scheduled rain dates. Picnic areas are available in the park around the amphitheater. For more information, call The Post at 202-334-6808 or the Carter Barron concert line, which will have updated information on weather-related cancellations, at 202-426-0486.