September 17th is going to be a significant day. We've got three, major occurrences:
1) the Jupiter/Neptune Rx opposition in Virgo/Pisces is exact
2) Mercury stations Rx in Libra
That's three, different areas of your chart where you'll feel a palpable shift.
Here's an explanation for each influence:
Jupiter/Neptune: reality versus fantasy across the Virgo/Pisces axis of your chart (at 7 degrees). Jupiter expands the potential to leap over your worries and just do that thing already, or you can get caught up in inflated details that mean nothing (or don't even exist).
Mercury Rx: pause and look more closely at both sides of the issue, in the Libra area of your chart (at 15 degrees). Libra is not known for fast decisions, and Mercury Rx can enhance the waffling. But that might not be a bad thing. Consider, then reconsider. Balance your ideas with theirs. And, look more closely at the seemingly superficial conversation. As with all Mercury Rx transits, it's possible to reconnect with people from your past and/or experience delays in communication, decisions and documents.
Saturn into Sagittarius: a return to issues in the Sag area of your chart (from 0 to 4 degrees). 4 degrees is as far as Saturn made it before he stationed Rx in Sag on Mar 14th, 2015. He retrograded over these degrees (second pass) until June 14th, 2015, when he reentered Scorpio. Now he'll commence his third and final pass over these degrees. This may be a confirmation of rules, focus or faith. Going back to something you believed in, and this time, going all the way with it. Or, taking on that extra responsibility, commencing the big project, setting your compass in one direction and moving ahead like you mean it. When Saturn grinds back and forth over a natal planet, angle or point, you need to get serious about it.
Altogether, you've got a culmination of fantasy/reality, a time to pause and reconsider, plus a shift in responsibility and focus. This will be a time to take stock of your next steps. The energy leading up to this day (and on this day) may feel slow. It's a changing of the guard in multiple areas of your chart, so don't expect to hit the ground running. Pause and think (Mercury Rx) about your new responsibilities/restrictions (Saturn) while noting any imbalances between fact and fiction, or hope and anxiety (Jupiter/Neptune).
Also, note the repetition of Mercury/Jupiter themes: Sag is ruled by Jupiter, Virgo is ruled by Mercury. Think carefully about how you communicate your hopes and ideals.Words (promises, plans, I-wish scenarios) will have meaning on multiple levels, some of which may not be fully revealed until Mercury stations direct.
A day of careful consideration and planning for the future.