when is it fall in the northern hemisphere
Autumn In North America, autumn is usually considered to start with the September equinox (21 to 24 September)[5] and end with the winter solstice (21 or 22 December).[6] Popular culture in North America associates Labor Day, the first Monday in September, as the end of summer and the start of autumn; certain summer traditions, such as wearing white, are discouraged after that date.[7] As daytime and nighttime temperatures decrease, trees shed their leaves.[8] In traditional East Asian solar term, autumn starts on or around 8 August and ends on or about 7 November. In Ireland, the autumn months according to the national meteorological service, Met Éireann, are September, October and November.[9] However, according to the Irish Calendar, which is based on ancient Gaelic traditions, autumn lasts throughout the months of August, September and October, or possibly a few days later, depending on tradition[citation needed]. In Australia and New Zealand, autumn officially begins on 1 March and ends on 31 May.[10]