It was an amazing day for Cliff Thorburn, the sport of snooker and Sheffield's Crucible theatre 33 years ago, today, April 23.
The Canadian-born star, now 68, recorded the first maximum 147 break in the World Snooker Championships, achieving the feat against Terry Griffiths at the Crucible.
Three years earlier, he had become world champion,one of only three players from outside the United Kingdom to win the world title in the modern era.
Also on this day, three years ago, Doncaster's Sarah Stevenson, Great Britain's most successful taekwondo fighter and a two-time world champion, announced her retirement.
The Bentley lass, now 33, was recruited into a coaching role in the Great Britain team.
1962: The career of racing driver Stirling Moss ended when he crashed his Lotus-Climax at 110mph during a Formula One race at Goodwood. He sustained a broken leg, broken ribs and serious head injuries and did not race again in Formula One.
Other notable events:
1986: Former England cricketer Jim Laker died, aged 63. His record of taking 19 wickets in one Test match still stands.
2003: Brazilian striker Ronaldo scored a hat-trick as Real Madrid beat Manchester United 4-3 at Old Trafford to progress to the Champions League semi-finals 6-5 on aggregate. David Beckham came off the bench to score two of United's goals.
2009: Roy Keane was appointed Ipswich manager on a two-year contract.
2012: Rangers owner Craig Whyte was banned for life from any involvement in Scottish football and a 12-month transfer embargo was imposed on the club as part of a series of punishments handed out by the Scottish Football Association as a result of the club's insolvency.
Darren Huckerby (soccer) - Former Coventry, Manchester City and Norwich forward, born 1976.
Barry Hawkins (snooker) - World Championship runner-up in 2013, born 1979.
Andy Webster (soccer) - St Mirren's former Hearts and Scotland defender, born 1982.
Daniela Hantuchova (tennis) - Slovakian winner of all four grand slams in mixed doubles, born 1983.
Steph Houghton (soccer) - Captain of Manchester City Women and England Women, born 1988.
Victor Anichebe (soccer) - West Brom's former Everton striker, born 1988.
Nicole Vaidisova (tennis) - Czech player, a former semi-finalist at the French and Australian Opens, born 1989.
Nathan Baker (soccer) - Aston Villa defender, born 1991.