Mercury stations retrograde on June 6, 1968 at 2° Cancer, and direct on June 30 at 23° Gemini — 24 days. From the Earth, Mercury seems to back up against the stars as we overtake it, as a car passed on the highway seems to slide backward. Astrology holds it a time for crossed wires and delays. Computed from JPL's approximate orbits; the stations agree with an almanac's to within minutes.