Autumn, Canada

Autumn, interchangeably known as fall in the US and Canada, is one of the four temperate seasons. Autumn marks the transition from summer into winter, in September  or March  when the arrival of night becomes noticeably earlier and the temperature cools considerably. The word autumn comes from the ancient Etruscan root autu- and has within it connotations of the passing of the year. It was borrowed by the neighbouring Romans, and became the Latin word autumnus.  Source