Ambush Theater performs at the Look Up! Night Street Fair. (DANIEL BEDELL) Our picks for the best free events this week, including a street festival from the Kennedy Center’s Look Both Ways: Street Arts Across America and a discussion on the Transit of Venus.

MONDAY

“The Importance of Being Earnest”

The National Theatre screens the 1952 film adaptation of the satirical Oscar Wilde play about two men maintaining fictitious personae. It’s part of a month-long series showcasing Wilde works that made it to the screen.

TUESDAY

Venus discussion

Sten Odenwald, an astrophysicist at NASA, discusses the occasions in which the planet Venus crossed the face of the sun, a rare event set to happen again this June.

WEDNESDAY

DJ from Down Under

Ben Browning of the Australian electronic group Cut Copy, whose 2011 album “Zonoscope” was released to wide acclaim, mans the decks at U Street Music Hall.

THURSDAY

Discussing the District’s past

John DeFerrari, author of the Streets of Washington blog, signs and discusses his new book, “Lost Washington, D.C.,” which looks at old landmarks from different periods in the city’s history.

FRIDAY

Look Up! Night Street Fair

A unicyclist, dancers imitating bugs, a juggler and a circus arts expert will perform as part of the Kennedy Center’s Look Both Ways: Street Arts Across America festival.

SATURDAY

International bazaar

Enjoy treasures from around the world as embassies of Islamic nations set up a bazaar featuring food, crafts, imported rugs, jewelry, copper ware and more for sale.

SUNDAY (UPDATE: “Song 1” has been extended until May 20).

Closing of ‘Song 1’

If you haven’t wandered over despite our many urgings, Monday is your last chance to see artist Doug Aitken’s film projections of colors and moving images on the circular exterior of the Hirshhorn Museum.

Head to the Fairgrounds, the new outdoor bar outside Nationals Park, for Family Day while the Nationals are out of town. Activities include carnival games, rides and music. Area food trucks will be on hand, too.