Here are transit lists of each planet Mercury through to Pluto showing dates and times when periods of Direct or Retrograde motion begin and end.

When Mercury stations Rx some report there are more mistakes made in communications, thinking skills are not as sharp, and quite a few Astrologers suggest avoiding Rx periods for signing contracts. Was Mercury Rx or Dx when you were born? What's the difference? What influence can we expect when progressed planets change direction? If you have questions like these about this interesting phenomena of apparent motion, I recommend you read Erin Sullivan's book "Retrograde Planets - Traversing The Inner Landscape". Check if it's still available via the Bookshop