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According to https://www.eventguide.com/today/months/18jun_list.htm

These are are the holidays just for today alone: June 5, 2018, Tuesday
Ketchup Day
National Veggie Burger Day
National Gingerbread Day
Sausage Roll Day
National Hunger Awareness Day (1st Tue)
World Environment Day
Women's Golf Day (1st Tue)
Festival of Popular Delusions Day
Hot Air Balloon Day
National Attitude Day
National Healthcare Recruiter Recognition Day (1st Tue)
Arbor Day (New Zealand)
Constitution Day (Denmark)
Apple ][ Day

They seem to have left off the list, that this is the day Robert F. Kennedy was shot. He did not die until the next day, but today was the day of the actual shooting. :(

Oh man thats a tragedy, we should remember our nations hero’s before anything else!