The 2013 calendar was a good calendar but this is what I would have done if I was in charge for F1.
Pre Season Tests:
28th February - 3rd March
Pre Season Test 1 - Jerez
14th March - 17th March
Pre Season Test 2 - Catalunya
21st March - 24th March
Pre Season Test 3 - Catalunya
2014 F1 Calendar - My suggested Calendar:
7th April
Australian Grand Prix
14th April
Japanese Grand Prix
28th April
Korean Grand Prix
5th May
Chinese Grand Prix
19th May
Indian Grand Prix
2nd June
Malaysian Grand Prix
9th June
Singapore Grand Prix
23rd June
Spanish Grand Prix
30th June
Monaco Grand Prix
14th July
British Grand Prix
21st July
Belgian Grand Prix
4th August
German Grand Prix
11th August
Hungarian Grand Prix
8th September
Italian Grand Prix
22nd September
Bahrain Grand Prix
29th September
Abu Dhabi Grand Prix
13th October
Canadian Grand Prix
20th October
United States Grand Prix
3rd November
Brazilian Grand Prix