There was a time when the year began in the month containing the beginning of Spring, namely March. This meant that February was the last month of the year, and it originally had 30 days. (This is...
No, February has 28 days, 29 if it is a leap year.
June has 30 days.
28; 2012 is the leap year...2013 is a normal year.
There is never 30 Days in February.