Calendar.

April 13-19

National Environmental Education Week, sponsored by the National Environmental Education Foundation to increase the impact of Earth Day through a full week of activities in classrooms, nature centers, zoos, museums and aquariums. For a participant tool kit, visit http://www.eeweek.org, or call 202-261-6484.

National Library Week, an observance sponsored by the American Library Association since 1958. This year's theme, "Join the Circle of Knowledge @ Your Library," is part of a public awareness campaign to promote the value of libraries and their staffs. Visit http://www.ala.org, or call 1-800-545-2433, ext. 5046.

April 27-May 3

National Volunteer Week, sponsored by the Points of Light & Hands On Network with Target Corporation, to recognize millions of volunteers who are helping to solve social problems in communities nationwide. For a tool kit, visit http://www.pointsoflight.org, or call 404-979-2900.

May 29-30

White House Faith-Based and Community Initiatives Conference, New Orleans, sponsored by a consortium of federal agencies for grassroots leaders interested in federal grant opportunities. To register online, visit http://www.fbci.gov/ or call 202-456-6708.