A few of the events planned for A Day Without Immigrants:

— Boycotts: Central theme of the day, with immigrants being urged to boycott work, school and shopping. In Tucson, Ariz., an organizer urged "no buying at all," not even calls to Mexico.

— Rallies: In New York City, immigrants and supporters planned to form human chains in several spots around lunch time. Advocates planned to march in Orlando, Fla., Allentown, Pa., and Seattle, among many other cities. In downtown Louisville, Ky., a procession was scheduled from the federal courthouse to Jefferson Park.

— Services: Roman Catholic churches holding immigration-themed Masses. Cardinal Justin Rigali of Philadelphia planned to deliver a homily about immigration reform during a noon Mass.

— Schools: New Haven, Conn., schools were bracing for a walkout, as were school officials in Denver. In Gainesville, Ga., administrators sent a letter home to parents saying absences would not be tolerated.