Quick answer.
September to December
Generally, seasons start and end on the solstices and equinoxes. Though some countries vary this slightly.
The dates also vary slightly.
For 2011 the dates are;
Spring equinox - 20 March
Summer solstice - 21 June
Autumnal equinox 23 September
Winter solstice 22 December
Therefore;
Spring northern hemisphere: Autumn (Fall) southern hemisphere
20 March to 21 June.
Summer northern: Winter southern
21 June to 23 September
Autumn (Fall) Northern: Spring southern
23 September 22 December
Winter northern: Summer southern
22 December 20 March
the first month of fall is september.February
Fall
Fall always starts on September 21st. Every season starts on the 21st of a month.
Some month in fall.
The term 'fall month' (a month in the fall) is a noun phrase, a group of words based on a noun that functions as a unit in a sentence.The noun phrase 'fall month' is made up of the common noun 'month' modified by the common noun 'fall' (a synonym for 'autumn' functioning as an attributive noun).A noun phrase will function as a noun as the subject of a sentence or a clause, or as the objectof a verb or a preposition. Examples:A fall month is my favorite time to vacation. (subject of the sentence)The milder weather that a fall month brings makes it a pleasant time of the year. (subject of the relative clause)We usually schedule a fall month for the picnic. (direct object of the verb 'schedule')I remember that it happened in a fall month. (object of the preposition 'in')
In the year 2016, the month of Abib fell in the month of April.
In the year 2016, the month of Nisan fell in the month of April.
October.
November.
September
november
In the US, fall officially ends in the month of December (specifically, December 21st), when winter begins.