Which U.S. observance falls on June 14?

The 1397 Union of Kalmar united Sweden with which two other kingdoms? Exodus 14:16 says the children of Israel "shall go on dry ground through the midst of the sea". Which sea? Which country, over 3,000 miles wide, borders 14 other nations? What is the French word for the number 14? Which 14-line poem may be Petrarchan or Shakespearean? Jeffrey Immelt was CEO of which company from 2001 to 2017, succeeding Jack Welch? Which show tune, sung by Louis Armstrong, ended the Beatles' 14-week run at No. 1 in 1964? At the 1997 U.S. Figure Skating Championships, 14-year-old Tara Lipinski upset which reigning world champion?