Saturday, April 13:  2nd Annual Big Island Aids Walk.  An easy 2 mile walk around Liliuokalani Gardens. Walk registration opens at 8 a.m. and the walk starts at 9 a.m. All funds raised will go directly to provide services for nearly 300 men, women and children living with HIV/AIDS on the island of Hawai`i. Funds will also go to support education, community outreach and free confidential 20-minute HIV & Hepatitis C testing.  Liliuokalani Gardens, Banyan Drive, Hilo. For information call…