Important days don't look like anything special when they start. Invariably, the sun rises and people wake up. Coffee is swilled and eggs are swallowed. Everybody goes about the business of acting like their lives matter and then, no matter how important the events of the day end up being, the sun invariably sets. The sun rose before the soldiers stormed Omaha Beach on D-Day, and the sun set after Archduke Franz Ferdinand was killed. Sunrises and sunsets are real jerks about putting things in perspective.
For some stories, it's easy. The moral of 'The Three Bears,' for instance, is "Never break into someone else's house.' The moral of 'Snow White' is 'Never eat apples.' The moral of World War I is 'Never assassinate Archduke Ferdinand.