In 1964, Mercury has four retrograde periods: in Capricorn, Taurus, Virgo and Sagittarius. The year opens with a retrograde carried over from the year before; it ends on January 15. The last ends on December 28.
Retrograde periods in 1964
December 26, 1963 – January 15, 1964
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Capricorn
- Length
- 20 days
April 16 – May 10
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Taurus
- Length
- 24 days
August 19 – September 11
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Virgo
- Length
- 23 days
December 9 – December 28
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- from Capricorn into Sagittarius
- Length
- 19 days