June 3 is World Bicycle Day.
June 4 marks the 239th anniversary of the first launch of a hot air balloon (unmanned) by the Montgolfier brothers in Paris, France.
June 14 also marks the 286th anniversary of the birth of Charles-Augustin de Coulomb, French physicist whose study of the behaviour of electrical charges resulted in the eponymous “Coulomb’s Law.”
June 21 is National Indigenous Peoples Day.
June 21 is also World Humanist Day.
On June 24, observers will be able to see the alignment of five planets: Mercury, Venus, Mars, Jupiter, and Saturn.