Mars Square Retrograde Uranus...

starts on December 2 (using a 1 degree orb), is exact on December 4 at 1.01am in Kilmore, leaves on December 5. Mars at 26 degrees and 40 minutes of Sagittarius, retrograde Uranus at 26 degrees and 40 minutes of Pisces.

Mars travelling through the fiery sign of Sagittarius may contribute to the ignition of a volatile, 'electrical' situation... the combination of Mars and Uranus looks as though it will provide the spark that will ignite an unexpected and exciting turning point in the areas represented by your birth chart.  Neither one of these energies is exactly a shrinking violet, so it seems that this is likely to be a bit of a roller-coaster ride period of time.

Squares generally represented a period tension, following by a turning point and growth. So, by looking at where this aspect is falling and which houses are ruled by them, we can get a feel for where we can expect the air to clear. Mars rules the houses with Aries or Scorpio on the cusp, Uranus rules the house with Aquarius on the cusp.

If you have personal planets and/or points in Sagittarius or Pisces then you may be more sensitive than others to this transit.