Happy St. Patrick's Day!

Did you know..

• In the United States, it's customary to wear green on St. Patrick's Day. But in Ireland the color was long considered to be unlucky, says Bridget Haggerty, author of The Traditional Irish Wedding and the Irish Culture and Customs Web site.

• According to the U.S. Census Bureau, 34 million United States residents claim Irish ancestry, or nearly ten times the entire population of Ireland today, which stands at 3.9 million. Among U.S. ethnic groups, the number of Irish-Americans in the U.S. is second only to the number of German-Americans. That would be me :)

• Chicago is famous for dyeing the Chicago River green on St. Patrick's Day. The tradition began in 1962, when a pipe fitters union—with the permission of the mayor—poured a hundred pounds (45 kilograms) of green vegetable dye into the river. (On the job, the workers often use colored dyes to track illegal sewage dumping.) Today only 40 pounds (18 kilograms) of dye are used, enough to turn the river green for several hours. According to the Friends of the Chicago River, a local environmental group, more people are likely to view the Chicago River on St. Patrick's Day than on any other day.