The 2013 Formula One calendar could again stretch to 20 races in the wake of Wednesday's final meeting this year of the World Motor Sport Council.
With the removal of the Grand Prix of America in New Jersey until 2014 due to financial and construction difficulties, it appeared the calendar for next season would revert back to 19 races following the record 20 this campaign.
However, the WMSC has opted to switch the German GP - which still does not have a confirmed venue - from July 14 to July 7, and which will now be back to back with the British GP at Silverstone.
In doing so, they have created a vacancy for July 21, which the WMSC state "has been reserved for another F1 European event, subject to the approval of the relevant ASNs (National Sporting Authority)".
F1 supremo Bernie Ecclestone is known to be in discussions with the new owners of the Istanbul Park in the hope of restoring the Turkish Grand Prix to the calendar, with the likelihood now next year.
That race would also form a double-header with the Hungarian Grand Prix on July 28 ahead of a four-week summer break across August.
2013 Formula 1 calendar: Mar 17 Australia, Mar 24 Malaysia, Apr 14 China, Apr 21 Bahrain, May 12 Spain, May 26 Monaco, Jun 9 Canada, Jun 30 Britain, Jul 7 Germany, Jul 21 TBC, Jul 28 Hungary, Aug 25 Belgium, Sep 8 Italy, Sep 22 Singapore, Oct 6 Korea, Oct 13 Japan, Oct 27 India, Nov 3 Abu Dhabi, Nov 17 United States, Nov 24 Brazil.