"An influence may last for as little as a few days to as long as half a year or so. You may also notice that the same interpretation shows up periodically during the year; this is not unusual. In some cases the beginning and ending dates of the 2 influences are the same; the only difference between the 2 interpretations is the peak date. This means that this particular influence has two peak dates instead of one. It is even possible for three or more peak dates to occur for the same astrological influence. To eliminate redundant interpretations, you may be informed that the astrological influence also occurred earlier and that you should refer back to the previous occurrence of this interpretation."