• Salon Ziba is celebrating its twentieth anniversary with $20 specials. This month, get a $20 single-process color with purchase of a blowout or haircut. 200 W. 57th St., at Seventh Ave. (212-767-0577); daily (8–7:30). Call for appointment.
• Learn more about perfume and its history at the Museum of Natural History's lecture, Adventures in the Global Kitchen: Aromatics Along the Silk Road. Perfumer Mandy Aftel will lead a discussion while attendees sample authentic and pure fragrance essences. Admission is $20; purchase tickets at amnh.org. American Museum of Natural History, Linder Theater, Central Park West at 79th St., first fl. (212-769-5100); 6:30.
• H Williams footwear and Krizia womenswear are 40 to 60 percent off at the joint sample sale. The Millburn flat riding boot is $380 (originally $895), the Rueda cutout bootie is $495 (originally $1,200), and the Elise bootie is $350 (originally $820). Krizia jackets, dresses, and coats are all 60 percent off. Prosecco will be served Wednesday evening. Through 1/24. 805 Madison Ave., nr. 67th St.; W (5–8), Th–S (10–6), Su (noon–5).
• Fall/winter merchandise for men and women is up to 50 percent off at A.P.C. 131 Mercer St., nr. Prince St. (212-966-9685); M–S (11–7), Su (noon–6).