I'm afraid there's no quick, easy, cheap solution.
One option is to have power to all the lights, all the time ... then have a timer at each pole, feeding a photoeye at each fixture, controlling each light. The drawback to this method is that every light will momentarily energize when the photocell is energized by the timer.
Your other choice is a better timer at each pole. That is, forget about 'dusk to dawn' and use an 'astronomical' timer. Such a timer is already programmed with sunset / sunrise times for each day, and will allow you to program a specific time 'off' as well.