Venus opposes Uranus at 23 degrees of Libra-Aries, and this becomes exact in the early morning hours of Sunday, September 18, so the energy will be felt the before, and the day after. This can bring major events if it aspects your personal chart, in combination with the eclipse in Pisces or some other major transit. Typically it would affect you if you have planets in Aries, Cancer, Capricorn and Libra at 22-24 degrees, but we will all feel the energy. This is primarily about relationships but can include non romantic relationships and other situations depending on where Venus is located in your chart.
Venus-Uranus transits tend to have to do with erratic and unpredictable events especially in relationships, and a desire not to be bored. Venus rules love and money, and is typically associated with love, women and our social lives. This can manifest as positive or negative, depending on other transits in your chart. At its best, a pleasant surprise.
Today is a good day or two to try something new or do something different. It could seem dynamic. If you meet someone new, it may or may not work out long term as Uranus is not associated with stability (and Mercury is retrograde)
By late Friday night, Saturday AM, the Moon is in Aries and it opposes Jupiter. You could overindulge or things could get blown out of proportion.
By late Saturday night the Moon squares Pluto, and things can get intense in a good or bad way depending on how you handle the energy. By Sunday morning before noon the Moon conjuncts Uranus and joins in the opposition to Venus. This can go several different ways. You could become unsettled or have a hard time deciding what to do, and Relationships can become unpredictable. Or, it could have a positive electric quality.
Some relationships may experience turbulence or end altogether, but typically they would be tottering on the brink anyway. If a relationship ends on this, there was no real stability to begin with.