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Math problem in the third grade of primary school: March 2009 1 How many days until September 30?
March: 3 1 day

April: 30 days

May: 3 1 day

June: 30 days

July: 3 1 day

August: 3 1 day

September: 30 days

31+30+31+30+31+30 = 31* 4+30 * 3 = 30 * 7+4 = 214 days.

These 2 14 days include March 1 day and September 30th.