Ashvin or Ashwin (Nepali: आश्विन , असोज, Bengali: আশ্বিন Ashbin; Sanskrit: अश्विन् /əˈʃwɪn/; Malay/Indonesian: Aswin; Thai: Asawin), also known as Aswayuja, is the seventh month of the lunisolar Hindu calendar, the Bikram Sambat which is the official solar calendar of Nepal and the parts of India. It is the sixth month in the solar Bengali calendar and seventh in the lunar Shaka calendar of the Deccan region. It falls in the season of Shôrot, (Sharad in Hindi) or Autumn. In Vedic Jyotish, Ashvin begins with the Sun's enter in Virgo.
It overlaps September and October of the Gregorian calendar and is the month preceding Diwali or Tihar the festival of lights. The month is here named Ashshin, Bengali script: আশ্বিন). In lunar religious calendars, Ashvin begins on the new moon after the autumn equinox.
Ashvini is the first star that appears in the evening sky. In Indian astrology it is the head of Aries, or the first of the 27 Nakshatra. Ashvin also stands for the divine twins, the Ashvins, the gods of vision, Ayurvedic medicine, the shining of sunrise and sunset, and averting misfortune and sickness in Hindu mythology. Asawin is the Thai variant of Ashvin and stands for warrior. The term is often translated into English as "knight".