Mercury conjuncts Mars at 7 degrees of Virgo, and this peaks Saturday, September 16, at 3:01, EST to be exact. After this the energies will be waning, but not gone. I originally wrote about this earlier this week. We actually experienced a Mercury-Mars conjunct on September 3.
Upset, agitated and angry people may be the norm, this day. Mars-Mercury in Virgo is worrisome, if not annoyed. The Night of the Long Knives comes to mind.
Watch your driving and everyone else's as well. I expect a great deal of road rage and accidents. You could also experience communication issues on many levels.
The other side of this energy is a burst of mental activity, debate, and planning actions. I would try and direct your energy here.
If this aspects a mutable planet (Gemini, Virgo, Sagittarius or Pisces) in your chart you will be affected on a greater level.
I expect this day or the day after to be a big news day. This transit will play out in the world, and hits Uranus in the US natal chart. We can expect to see unexpected events and it could get volatile. Use caution.