Emancipation Day (Regional) Calendar When: April 16, 2012 all-day 2012-04-16T00:00:00-05:00 2012-04-17T00:00:00-05:00 Where: USA Holiday Washington DC Only. Weekday closest to April 16th. Washington DC Only. Weekday closest to April 16th. A regional holiday in Washington DC. Information provided by www.officeholidays.com