Historical clue formulations

• Title religious school in a classic Crosby/Bergman film — 2015-03-27
• River draining Lake Superior — 2015-03-13
• Whitefish Island's river — 2011-12-10
• Title locale in a classic Bing Crosby film — 2007-01-25
• River to Lake Huron — 2004-05-15
• Crosby's parish — 1995-02-18