Cheeseburger day is celebrated annually on the 18th September. The best way to celebrate the holiday is to eat a lot of cheeseburgers!
Mardi Gras means "Fat Tuesday" in French, reflecting the practice of eating fatty foods on the last night before ritual fasting and Lent fasting.
Purim is the plural form of the Hebrew word pur, which means to throw away in the sense of random selection.
Watermelon is called "the king of midsummer", refreshing and quenching thirst, tastes sweet and juicy, is a good summer fruit.