On which date in 1984 did Sergey Bubka break the world pole vault record for the first time?

Serhiy Nazarovych Bubka (born 4 December 1963) is a Ukrainian former pole vaulter. He represented the Soviet Union until its dissolution in 1991. Bubka was twice named Athlete of the Year by Track & Field News, and in 2012 was one of 24 athletes inducted as inaugural members of the International Association of Athletics Federations Hall of Fame.

Bubka won six consecutive IAAF World Championships, an Olympic gold medal and broke the world record for men's pole vault 35 times. He was the first pole vaulter to clear 6.0 metres and 6.10 metres.

He set his first world record of 5.85m on 26 May 1984 which he improved to 5.88m a week later on 2 June, and then to 5.90m a month later on 13 July. He cleared 6.00 metres (19 feet 8 inches) for the first time on 13 July 1985 in Paris. This height had long been considered unattainable. With virtually no opponents, Bubka improved his own record over the next 10 years until he reached his career best and the then world record of 6.14 m (20 feet 1​3⁄4 inches) in 1994.