Slane Deal: 50% off jewelry, with rings for $60 (were $120) and freshwater pearl necklaces for $165 (were $330) When/Where: Tuesday, December 21 through Wednesday, December 22. Daily 10am—6pm. 48 W. 25th St between Broadway and Sixth Ave (212-691-5820) Michael Kors Collection Deal: Fall ready-to-wear is half off, and fall handbags, shoes, belts and accessories are 40% off. When/Where: Ongoing. Mon—Sat 10am—6pm. 974 Madison Ave between 76th and 77th Sts (212-452-4685) Bird Deal: 25% off fall 2010 merchandise from Suno, Swedish Hasbeens, Phillip Lim, APC, and more When/Where: Friday, November 26 through Tuesday, December 28th. Mon—Fri noon—8pm, Sat noon—7pm; Sun noon—6pm. Cobble Hill: 220 Smith St at corner of Butler Street St (718-797-3774). Park Slope: 316 Fifth Ave between 2nd and 3rd Sts (718-768-4940). Williamsburg: 203 Grand St between Bedford and Driggs Aves (718-388-1655). Opening Ceremony Deal: 30% to 50% off labels like Alexander Wang, Altuzarra, and Proenza Schouler When/Where: Begins Friday, November 26; ongoing. Soho: Mon—Sat 11am—8pm, Sun noon—7pm. 35 Howard St between Broadway and Crosby Sts (212-219-2688.) Ace Hotel: Sun—Tue 10am—9pm, Wed 11am—7pm, Thu—Sat 11am—10pm. 1190-1192 Broadway at 29th St (646-695-5680.)