Preposition in months year in seasons part of the day duration part of the day at time of day celebrations fixed phrases days of the week date on special holidays a special part of a day after ago before between by during for later than sth. how far sth. happened (in the past) earlier than sth. time that separates two points not later than a special time through the whole of a period of time period of time Use Examples in July; in September in 1985; in 1999 in summer; in the summer of 69 in the morning; in the.