October (i/ɒktˈoʊbər/ ok-TOH-bər) is the tenth month of the year in the Julian and Gregorian Calendars and one of seven months with a length of 31 days. The eighth month in the old Roman calendar, October retained its name (from the Latin octō meaning "eight") after January and February were inserted into the calendar that had originally been created by the Romans.October is commonly associated with the season of autumn in the Northern hemisphere and spring in the Southern hemisphere, where it is the seasonal equivalent to April in the Northern hemisphere and vice versa. In the Western world, October is also commonly associated with Hallowe'en (All Hallows Eve), which initiates the season of Allhallowtide.In common years January starts on the same day of the week as October, but no other month starts on the same day of the week as October in leap years. October ends on the same day of the week as February every year and January in common years only. In common years, October starts on the same day of the week as May of the previous year while in leap years, October starts on the same day of the week as August of the previous year. In common years, October ends on the same day of the week as May of the previous year while in leap years, October ends on the same day of the week as August and November of the previous year. In years immediately before common years, October starts on the same day as April and July of the following year while in years immediately before leap years, October starts on the same day of the week as September and December of the following year. In years immediately before common years, October ends on the same day of the week as July of the following year. In years immediately before leap years, October ends on the same day of the week as April and December of the following year.