Mercury has three - four retrograde periods each year.
In 2016 Mercury is expected to go retrograde:
January 5 to 25
April 28 to May 22
August 30 to September 22
December 19 to 31
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Mercury's retrograde periods occur three to four times a year, typically lasting around three weeks each time. The exact dates of Mercury retrograde can vary, but they generally happen in the months of January, May, September, and October. It's advisable to check a current astrological calendar for the most up-to-date information.
If you mean "retrograde rotation", they are Venus and Uranus.
The apparent westward movement of a planet is known as retrograde motion. This phenomenon occurs when a superior planet passes Earth in its orbit, making it appear to move backward in the sky relative to the stars.
Retrograde.
Mercury Retrograde was created on 2008-06-03.
Venus and Uranus have retrograde rotation.There are other meanings of retrograde motion, but retrograde rotation fits the question best.