https://www.formula1.com/en/latest/article.formula-1-and-fia-confirm-changes-to-imola-weekend-timetable-full-details.12vf4JGyyqsuIAXyNaMViC.html
Formula 1 and the FIA have made changes to the schedule for the Emila Romagna Grand Prix in Imola out of respect for the funeral service of His Royal Highness The Prince Philip, Duke of Edinburgh that will take place on Saturday 17th April 2021.
As a mark of respect for the Royal funeral, Qualifying will be moved to avoid a clash with the service.
This means Qualifying will take place between 1400–1500 CET. As a result FP3 will move to 1100–1200 CET in order to comply with the regulations that state Qualifying must be 120 minutes after FP3.
On Friday, FP2 will move to 1430-1530 CET and FP1 will move to 1100-1200 CET due to the rules requiring those sessions to be separated by at least two and a half hours and FP3 needing to start no less than nineteen hours after the end of FP2.
There will be a minute of silence ahead of Qualifying as an opportunity for people to pay their respect.