Tuesday, March 21 Santa Clarita’s Future The Los Angeles Headquarters Association holds a symposium on future development in Valencia and elsewhere in the Santa Clarita Valley. The conference starts at 11:30 a.m. at the Hotel Inter-Continental, 251 S. Olive St., Los Angeles. Information: (323) 663-5242. Wednesday, March 22 Have a Plan? The Service Corps of Retired Executives holds a seminar, “Developing Your Business Plan.” The seminar begins at 9 a.m. at the U.S. Small Business Administration offices, 330 N. Brand Blvd., Suite 190, Glendale. Information: (818) 552-3206. Thursday, March 23 Future Economics The Executive Association of the San Fernando Valley holds an economic forecast conference, “Los Angeles in the 21st Century.” The symposium starts at 7:30 p.m. at the Skirball Cultural Center, 2107 Sepulveda Blvd., Los Angeles. Information: (818) 773-7661. Aides’ Fete A reception will be held by The United Chambers of Commerce of the San Fernando Valley to honor field representatives of local legislators. Reception begins at 5:30 p.m. at Airtel Plaza Hotel, 7277 Valjean Ave., Van Nuys. Information: (818) 981-4491. Friday, March 24 A Penny Saved The International Coin Collectors Society holds its annual Coin Expo in Encino. The event starts at 11 a.m. at the St. Nicholas Community Center, 17114 Ventura Blvd., Encino. Information: (818) 997-6496.