The clouds formation at the Ashvin or Autumn in Kolkata.
Ashvin (/əˈʃhwɪn/; अश्विन्), also known as Aswayuja, is the seventh month of the lunisolar Hindu calendar, the solar calendar where it is known as Aipassi and the solar India's national civil calendar. It is the sixth month of the solar Bengali calendar. It falls in the season of Shôrot, (Sharad in Hindi) or Autumn. In solar religious calendar, Ashvin begins with the Sun's exit from Virgo.
It overlaps September and October of the Gregorian calendar and is the month preceding Diwali, the festival of lights. The month is here named Ashshin, Bangla lipi আশ্বিন). In lunar religious calendars, Ashvin begins on the new moon after the autumn equinox.