In 1980, Mercury has three retrograde periods: in Pisces, Cancer and Scorpio. The first begins on February 25. The last ends on November 12.
Retrograde periods in 1980
February 25 – March 19
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Pisces
- Length
- 23 days
June 28 – July 22
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Cancer
- Length
- 24 days
October 22 – November 12
Over
- Shadow begins
- Retrograde begins
- Turns direct
- Shadow ends
- Sign
- Scorpio
- Length
- 21 days