And tonight it will be Alex Trenoweth. Notice follows. Make it if you can ...
Growing Pains: the role of Saturn and Jupiter in the Nativity
Tonight I have to stay in the Netherlands

. But seriously, I find that there are quite some interesting repetings of planetary positions to be found in adolescence. Apart from the Jupiter return at 12 and the half Saturn at 14/15 there are some interesting positions in relation to the birthdays or solar returns.
Mercury 41 synodic returns in almost exactly 13 years
Venus 5 synodic returns in almost exactly 8 years
10 synodic returns in almost exactly 16 years
(these cycles were known in Medieval times as the Pentagramma Veneris)
Mars 7 synodic returns in a bit shorter than 15 years
8 synodic returns in a bit longer than 17 years
(15 times in 32 years is a more exact one)
Moon 235 synodic returns in almost exactly 19 years (Metonic cycle)
And as (parts of) transits Jupiter return = square at 15, and
Jupiter return + opposition at 18
Finally, if you use the lunar nodes, the nodal return at 18,613 years.
Another cycle is the Saros of 18years and 10 days in which eclipses occur in very similar circumstances.
These (synodic) cycles are very interesting and I believe them to be significant in life. Perhaps in a biological/organic sense.