Time to spring forward … What: Kate Spade When: Apr. 4 & 5; Tues. & Wed., 9 a.m.-7 p.m. Where: Metropolitan Pavilion, 125 West 18th Street, between Sixth and Seventh Avenues (212-739-6569). Why: Shoes, raincoats, handbags, stationery, pajamas, luggage, small goods, and Jack Spade accessories are 50 to 55 percent off. What: Calypso Warehouse Sale When: Apr. 6-9; Thurs.-Sat., 10 a.m.-7 p.m.; Sun., 11 a.m.-5 p.m. Where: 148 Lafayette Street, between Howard and Grand Streets, fifth floor (212-941-6100). Why: Calypso linen skirts, were $175, now $45; dresses, were $200, now $75; beach totes, were $200, now $50; SIWY jeans, were $200, now $85. What: M+J Savitt When: Apr. 4-6; Tues.-Thurs.; by appointment only. Where: 475 Fifth Avenue, at East 41st Street, twentieth floor (212-684-4221 ext. 12). Why: Save 30 to 60 percent off lavish baubles rarely found on sale. R.S.V.P. to email@example.com. What: Ben-Amun When: Apr. 5-7; Wed.-Fri., noon-6:30 p.m. Where: 246 West 38th Street, between Seventh and Eighth Avenues, twelfth floor (212-944-6480). Why: Want a badass necklace? Some bangles? Jewelry sold at Scoop and Saks is up to 60 percent off retail. What: Noir When: Apr. 11-13; Tues.-Thurs., 11 a.m.-7 p.m. Where: 350 West 38th Street, between Eighth and Ninth Avenues, fifth floor (212-244-4846). Why: Costume cocktail rings, were $75, now $20; handbags, were $120, now $45; belts, were $105, now $30. What: Auto When: Apr. 6-9; Thurs. & Fri., 11 a.m.-7 p.m.; Sat., noon-7 p.m.; Sun., noon-6 p.m. Where: 803 and 805 Washington Street, between Gansevoort and Horatio Streets (212-229-2292). Why: Egg by Susan Lazar baby blankets, were $115, now $60; Jane D’Arensbourg rings, were $65, now $15; Virginia Johnson tunics, were $189, now $57; Paul Smith hats, were $150, now $90; Allison Burns bags, were $198, now $120; Dwell duvets, were $175, now $85. What: Bridal Atelier by Mark Ingram When: Apr. 7 & 8; Fri., noon-7 p.m.; Sat., 10 a.m.-6 p.m. By appointment only. Where: 127 East 56th Street, between Lexington and Park Avenues, third floor (212-319-6778). Why: Angel Sanchez, Anne Barge, Monique Lhuillier, Peter Langner, and others — all up to 80 percent off.