Sunday’s leap year. That’s one extra day you won’t get again until 2008. You’d best make it memorable.

DO

Gramercy Garden Show
What: Exotic plants, orchids, antique garden furniture, and gardening seminars.
Why: Martha may be headed for the slammer. The torch needs passing.
When: Fri. & Sat., 11 a.m.-7 p.m.; Sun. 11 a.m.-5 p.m.
Where: 69th Regiment Armory, 68 Lexington Ave., at 26th St. (212-255-0020).

EAT

Spice Market
What: Jean-Georges Vongerichten and Gray Kunz team up in the Meatpacking District.
Why: Duh. Because it’s Jean-Georges. And Sex and the City refugees need to fill that Sunday void.
When: Dinner served till midnight; bar open till 4 a.m.
Where: 403 West 13th St., at Ninth Ave. (212-675-2322).

Dominic Restaurant and Social Club
What: Chef John Villa will raffle off a week at his Tuscan villa. One entry per dinner; winner picked 3/1.
Why: Because usually all you get after a great meal is a cheap mint.
When: Lunch served noon-2:30 p.m.; dinner served 5:30 p.m.-11:30 p.m.
Where: 349 Greenwich St., at Harrison St. (212-343-0700).

HEAR

CBGB Friday Lineup
What: Indie rock acts Booty Olympics, the Blondes, and Inevitable Breakups raise funds for victims of the Avenue B fire.
Why: Secret surpise guests. Can’t name names, but unscramble the clues: Boym and Krostes.
When: Fri., 7:30 p.m.-2 a.m.
Where: CBGB, 315 Bowery, at Bleecker St. (212-982-4052).

BUY

Ghost Sale
What: Their fall merch is up to 70 percent off.
Why: Boo! Dresses and tops so lovely it’s scary.
When: Fri. & Sat., 11 a.m.-7 p.m.; Sun., noon-6 p.m.
Where: 28 Bond St., b/t Lafayette St. and Bowery (646-602-2891).

Jamin Puech Sale
What: Fetching (and spenny) straw, fringed, and beaded accessories are up to half off.
Why: Gamine style en solde. Who’s complaining?
When: Fri. & Sat., 11 a.m.-7 p.m.; Sun., noon-6 p.m.
Where: 247 Elizabeth St., b/t Houston and Prince Sts. (212-431-5200).