The pattern moves into air
The first runs 24 January to 14 February in Aquarius, twenty one days. The second runs 21 May to 14 June in Gemini, twenty four days. The third runs 19 September to 11 October in Libra, twenty two days.
Compare that with 2027, where every retrograde stepped back a sign, and with 2026, where all three sat in water. The element shifts because Mercury's synodic period of about 116 days does not divide the year evenly, so the whole pattern creeps backwards through the zodiac a few degrees at a time and takes several years to move from one element to the next.
Contained retrogrades read more simply
When a retrograde begins and ends in the same sign, the degrees it covers three times all belong to that sign. The interpretation stays within one register instead of spanning two, which is why a contained retrograde is usually described as more concentrated and a boundary-crossing one as broader.
Whether that distinction holds up is a question about astrology rather than about astronomy. What is not in question is the geometry: the retreat is about twelve degrees, and whether that lands inside a sign or across a boundary depends entirely on where the station falls.
What a station actually is
Mercury never changes direction. It orbits the Sun in one direction the whole time, taking about eighty eight days. What changes is the angle we see it from as Earth and Mercury pass each other, and for a few weeks that angle makes it appear to slide backwards against the stars.
The two moments where the apparent motion is zero are the stations. On those days Mercury sits at one degree for an unusually long time, which is the part of the cycle astrologers watch most closely. The dates in the table are those moments, computed rather than quoted.
The rest of the 2028 sky
Venus is retrograde from 10 May to 22 June, which happens only about every nineteen months and overlaps the second Mercury period. Jupiter is retrograde from January to mid May, Saturn from late August into 2029.
Having two inner planets retrograde at once in late May and June is the configuration worth noticing in 2028, far more than any single Mercury period. Venus retrogrades are rare enough that they are genuinely uncommon, unlike Mercury's, which arrive three times a year without fail.
Questions people ask about this
When is Mercury retrograde in 2028?
24 January to 14 February in Aquarius, 21 May to 14 June in Gemini, and 19 September to 11 October in Libra. Times in the table are UTC.
Why are the 2028 retrogrades all in air signs?
Because each retrograde falls about a third of the zodiac from the last, and signs of the same element sit exactly a third apart. The pattern drifts slowly, so it stays in one element for several years before moving on.
Do any 2028 retrogrades cross a sign boundary?
None of them. Each begins and ends in the same sign, so the degrees covered three times all sit within Aquarius, Gemini or Libra respectively.
Is Venus retrograde in 2028?
Yes, from 10 May to 22 June, overlapping the Gemini Mercury retrograde. Venus goes retrograde only about every nineteen months, which makes it much rarer than Mercury's.
How long does each 2028 period last?
Between twenty one and twenty four days. Mercury's orbit is eccentric enough that the length genuinely varies from one retrograde to the next rather than sitting at a fixed three weeks.
Does Mercury retrograde happen at the same time every year?
No. Each one falls about ten days earlier than the equivalent period the year before, because the synodic cycle of roughly 116 days does not fit a whole number of times into a calendar year.