for the planetary transits you will need to have a look at the efemeris at the followint website:

http://www.astro.com/swisseph/swepha_e.htm
here you get the movements os planets for the past and the future.

Then, in the astrological index you can find which zodiac degree corresponds to which hexagrams (or the other way around) so you will know how long will each planet transit each gate in each case each year.

You ned to ask someone to send you the astrological index, many people have it.