September 4 is International Vulture Awareness Day.
September 10 is World Suicide Prevention Day.
The September equinox, this year on the 22nd at 19:21 UTC, marks the end of summer in the northern hemisphere.
September 22 also marks the 220th birthday of Michael Faraday. PSA: If your car uses a keyless entry system, you may want to consider protecting it from hackers with a Faraday Cage.
September 30 has been recently designated the National Day for Truth and Reconciliation (aka Orange Shirt Day), as part of demonstrating Canada’s commitment “to reconciliation and to ensuring that the tragic history and ongoing legacy of residential schools is never forgotten.”