Sports bodies including the English Football League, Premier League and Premiership Rugby have opted to move fixtures to avoid a clash with Prince Philip's funeral on Saturday.
The Duke of Edinburgh died aged 99 on Friday, and his funeral will take place on Saturday, April 17, at St George's Chapel at 3pm.
A national minute's silence will be held at 3pm, prompting various sports organisations to adjust their fixture schedules for this weekend.
According to UK Government guidance: "The decision as to whether sporting fixtures continue to go ahead is at the discretion of organisers. Organisers may wish to consider using black armbands and observing a silence before matches are played."
A total of 32 EFL games across the Championship, League One and League Two had been scheduled to kick off at 3pm on Saturday, with the body saying it "will now work with its clubs to determine at what time the matches will be played".
The Premier League has announced that the match between Wolves and Sheffield United, which had been due to kick off at 3pm on Saturday, would now be played at 8.15pm.
The day's other Premier League game, Newcastle v West Ham, will still kick off at 12.30pm.
The FA Cup semi-final between Chelsea and Manchester City at Wembley is at 5.30pm.
Premiership Rugby, meanwhile, has amended the kick-off times of all four of its matches on Saturday.
Sale's match against Gloucester and Exeter's home game against Wasps will both start at 12.30pm, while Newcastle v Bristol will kick off at 5pm, along with Harlequins v Worcester.
A Premiership Rugby statement said: "As a mark of respect for HRH Prince Philip, the Duke of Edinburgh, Premiership Rugby can confirm that all Gallagher Premiership Rugby matches scheduled to be played between 3pm and 4pm on Saturday 17 April will be moved to avoid a clash with his funeral service.
"We have already started discussing the logistical details with our clubs and broadcasters and will make an announcement as soon as possible."
In Scotland, there are six Scottish Cup fourth-round matches scheduled around the time of the funeral, including Rangers against Celtic at 4pm.
The Scottish Football Association says it is has "entered dialogue with the relevant stakeholders" regarding those fixtures.
Elsewhere, the Scottish Grand National at Ayr has been moved from Saturday to Sunday, April 18.
The British Horseracing Authority has also moved the Spring Trials at Newbury to the Sunday and announced there will be no racing between 2.45pm and 4.15pm on Saturday.
In cricket, the nine County Championship matches scheduled on Saturday will be paused between 2.50pm and 4.10pm. The England and Wales Cricket Board has also asked all recreational cricket clubs to do the same.