A. The date shown in point A on the right is between the autumnal equinox and the winter solstice, that is, between September 23rd and February 22nd of 12, which does not meet the question.

B, June 13 is summer in the northern hemisphere, and Jinan has short days and long nights, which meets the meaning of the question;

C, the dragon boat race is on the Dragon Boat Festival, that is, the fifth day of May, so it does not meet the meaning of the question;

D and June are the winters in the southern hemisphere. The Cape of Good Hope belongs to the Mediterranean climate, and the winters are mild and rainy.

Therefore, choose: B.