Probable postponement of the Australian GP
After the 2020 fiasco, the FIA authorities seem to be anticipating the situation related to Covid-19 with a likely postponement of the Australian Grand Prix, normally scheduled for March 21, 2021.

Many remember the embarrassment faced by the organizers of the 2020 Australian GP as well as the FIA.
After maintaining the competition weekend and as Covid-19 was rapidly spreading across the globe, the announcement of the cancellation of the trials was made at the very last moment, leaving many spectators already present around the Australian track bewildered.
Keen to avoid a fate similar to the 2021 edition and given the logistical and economic stakes, the FIA authorities are already planning a likely postponement for a race originally scheduled for March 21, 2021.
We do not currently have more information regarding a possible rescheduling or cancellation date.
Everything therefore suggests that the start of the 2021 F1 season will begin in Bahrain on March 28.