May 16, 1981 (Saturday)
- Soyuz 40, carrying the first Romanian cosmonaut, Dumitru Prunariu, and veteran Leonid Popov, docked with the Salyut-6 space station, two days after launching. The pair were greeted by Vladimir Kovalyonok and Viktor Savinykh, who had been in outer space since March 12.
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