PREPOSITIONS OF TIME

       * hours (at 8:00)

AT  * holidays (at christmas)

         * at ninght, at noon

         * days (on monday)

ON * dates (on april 25th)

         * on weekdays, on weekends / the weekend

       *months (in august)

IN * seasons (in the einter)

       * years (in 1992)

       * in the morning, in the afternoon, in the evening