The FIA World Motor Sport Council has now issued an official 2015 F1 calendar featuring 21 races.
Korea has now returned with a provisional May date, although it remains to be seen whether the intention is to run at the venue used until 2013 or a new street track, which has been mooted.
The dates of the Chinese and Bahrain races have also been changed, and they now run back to back. Previously Bahrain was twinned with Malaysia.
2015 FIA F1 World Championship
March 15: Australia
March 29: Malaysia
April 12: China
April 19: Bahrain
May 3: Korea (TBC)
May 10: Spain
May 24: Monaco
June 7: Canada
June 21: Austria
July 5: GB
July 19: Germany (Nurburgring)
July 26: Hungary
August 23: Belgium
September 6: Italy
September 20: Singapore
September 27: Japan
October 11: Russia
October 25: USA
November 1: Mexico
November 15: Brazil
November 29: Abu Dhabi
Adam Cooper's F1 Blog 