Mercury retrograde dates in 1991
Mercury turns retrograde 3 times in 1991 and is already retrograde on 1 January.
Mercury is the fastest planet and turns retrograde more often than any other, about three times a year. Each retrograde lasts between 20 and 24 days, and the start of one comes 108 to 125 days after the start of the last.
Mercury stays near the Sun in the sky, and its retrograde happens when it passes between the Earth and the Sun. In tradition Mercury stands for thinking, speech and travel, and astrologers who follow retrogrades read a Mercury retrograde as a time to revisit them. That is a tradition of interpretation, not a measured effect.
Stations in 1991
Turns direct
Thursday 3 January 1991, 19:51
Sagittarius 23°
Turns retrograde
Thursday 4 April 1991, 21:08
Aries 29°
Turns direct
Sunday 28 April 1991, 12:50
Aries 17°
Turns retrograde
Thursday 8 August 1991, 03:02
Virgo 5°
Turns direct
Saturday 31 August 1991, 17:31
Leo 23°
Turns retrograde
Thursday 28 November 1991, 18:58
Sagittarius 24°
Turns direct
Wednesday 18 December 1991, 13:14
Sagittarius 7°
Stations are found by Astrely's own code from the planets' positions and are shown in Nicosia time. Mercury's stations are checked against NASA/JPL Horizons to within four minutes; the outer planets move so slowly around a station that their times are best read to the day. The method page has the details.
Astrology is a tradition of interpretation. What is written here is traditional, offered for reflection and entertainment, not advice and not a prediction.