Here is the list of ALL the leagues that start before July in FM 2012. I tested it with all the Premier Divisions.I don't know if by choosing a Lower Division the dates change,i don't think so.
Decide which is the best League to start and prepare your team.
Austria: 11th June
Belgium: 29th June
Bulgaria: 8th June
Croatia: 14th June
Denmark: 22nd June
France: 28th June
Germany: 13th June
Holland: 20th June
Hungary: 14th June
Israel: 20th June
Mexico: 28th June
N.Ireland: 19th June
Poland: 21st June
Portugal: 11th June
Romania: 14th June
Scotland: 21st June
Serbia: 28th June
Slovakia: 7th June
Slovenia: 16th June
Switzerland: 14th June
Ukraine: 7th June
Wales: 2nd June
Decide which is the best League to start and prepare your team.
Austria: 11th June
Belgium: 29th June
Bulgaria: 8th June
Croatia: 14th June
Denmark: 22nd June
France: 28th June
Germany: 13th June
Holland: 20th June
Hungary: 14th June
Israel: 20th June
Mexico: 28th June
N.Ireland: 19th June
Poland: 21st June
Portugal: 11th June
Romania: 14th June
Scotland: 21st June
Serbia: 28th June
Slovakia: 7th June
Slovenia: 16th June
Switzerland: 14th June
Ukraine: 7th June
Wales: 2nd June