30 THINGS TO DO IN April

Aveda, Wildlife Works, and Global Greengrants support Earth Month by auctioning off - k ( celebrity-designed T-shirts on eBay through April 30. ⅝ > -

2 LET THEM ENTERTAIN YOU. Envy, starring Jack Block and Ben Stiller, opens today.

"Unbuilt Chicago," at the Art Institute of Chicago, exhibits blueprints and models of architectural ideas never brought to fruition in the Windy City.

4 JUST DONT CALL HIM MR. KAHLO. "The Cubist Paintings of Diego Rivera: Memory, Politics, Place" opens at the National Gallery of Art, in Washington, D.C.

The Victoria and Albert Museum, in London, mounts a refrospective of clothing designer Vivienne Westwood's 34-year career.

6 VIEW THE hIETHOD BEFORE THE MADNESS at the Met's exhibition "Christo and Jeanne-Claude: The Gates," which traces the evolution of the artists' much-anticipated Central Park installation.

CALCULATE HOW MANY WORDS A PICTURE IS WORTH. Painted Poems: Rajput Paintings," at California's Norton Simon Museum, features Indian paintings, 1450-1900.

SEE THE MOON IN A DEWDROP. Or, you know, do your best. It's Hana Matsuri, Buddha's birthday, in Japan.

The annual Ivy League Film Festival kicks off today at Brown University, in Providence, Rhode Island.

DANCE TO 80S FAVORITES. Duran Duran sings "Rio," "Girls on Film," and "Reflex," among others, when the band's first U.K. tour in 18 years launches tomorrow evening.

for Easter eggs and candy. It's more fun if you wear bunny ears, but don't confuse the locals.

FIND TEXTUAL ENLIGHTENMENT. Luminous Manuscript, a grand-scale mosaic tablet created by sculptor Diane Samuels, goes on display at the Center for Jewish History, in New York.

Look-Look, a new art magazine made up of submissions from amateur artists, is available at bookstores this month.

BANISH EXPECTATIONS OF A GLASS HALF FULL. At the Duke Theater in New York, Neil LaBute's The Distance from Here depicts an American burbscape rife with deception.

No one at the Milan International Furniture Show will hold it against you.

BE A WITNESS TO THE DEFINITIVE MARRIAGE OF FASHION AND ART. The "Fashioning Fiction in Photography Since 1990" exhibition debuts at MoMA in Queens.

after viewing "A Transatlantic Avant-Garde: American Artists in Pans, 1918-1939," at the Terra Museum of American Art, in Chicago.

` 8 WONDER JUST HOW CATTY THINGS GOT I BACKSTAGE. Those VH1 Divas appear live at the MGM Grand.

Patriots' Day commemorates (among other things) the midnight ride of Paul Revere.

2 0 FALL IN LOVE WITH DIANE KEATON-AGAIN. Watch Annie I-Sail on DVD. Woody Allen's great film premiered on this day in 1977

while watching PBS's telecast of the American Ballet Theatre's performance of Sir Frederick Ashton's The Dream.

2 2 HAVE A RARE DOOGIE-HOWSER-h4EETS-LEE-HARVEYOSWALD MOMENT. Neil Patrick Horns plays the loiter in Sondheim's Assassins at the Roundabout Theatre Company, N.Y.C.

about the 35th Annual New Orleans Jazz & Heritage Festival, which this year spotlights South African culture and music.

2 4 ORDER YOUR LATTE in iambic pentameter. It's Shakespeare's birthday.

Tom Stoppard's Jumpers, a philosophical debate and crackling murder mystery rolled into one big comedy, opens at Broadway's Brooks Atkinson Theatre.

2 6 START AN EXPAT CIRCLE. "Gondola Days: Isabella Stewart Gardner and the Palazzo Barboro Circle," at Boston's Gardner Museum, explores the American artists' scene in 1 9th-century Venice.

Garry Hynes directs A Streetcar Named Desire, the first production in a series at the Kennedy Center celebrating the writer's work.

2 8 FIND WHATS HIDDEN. "Fred Wilson: Objects and Installations: 1985-2000," at the Studio Museum, in Harlem, N.Y.C., showcases the activist-artist's revealing work.

The London hit Bombay Dreams, about a struggling young dreamer who longs for Bollywood stardom, comes to the Broadway Theatre, in New York.

3 0 BE A DANCE AFICIONADO-OR JUST LOOK LIKE ONE. Show up at the world premiere of Sylvia, Mark Morris's new full-length ballet, at the San Francisco Ballet.