Happy Duanwu Festival
Duan Wu Jie is a widely celebrated festival amongst the Chinese, to pay respect to the patriotic poet, Qu Yuan (pronounced as Chue Yuan). The legend involves a really long and complicated throne-fighting war and political history. But to make a long story short: Qu Yuan was an important minister back in Chu Kingdom in ancient China. He had been known for his loyalty for the emperor of Chu, and loved his country greatly. However, His Majesty had not taken Qu Yuan's advice seriously, and he eventually got himself trapped and captured in a foreign land by his enemies, which then lead to his own death.
Sad and angry at the corrupted, dying Kingdom, Qu Yuan tied himself to a big rock and threw himself into the River of Puo Luo. The people then made rice dumplings wrapped in bamboo leaves and threw them into the river. They believed this would stop the fish from eating Qu Yuan's body. Some would even row down stream in a boat, beating drums and shouting out loud in the hope to scare the fish away (it was believed that it is how the Dragon Boat event is related to the festival.
Since then, the 5th day of the 5th month in the Chinese calendar has been set as Duan Wu Festival to remember the incident. Although there were versions of legends and stories that indicate Duan Wu has existed way before Qu Yuan's death, the tradition still carries on.
The rice dumplings (ZongZi) are glutinous rice (or sticky rice in some countries like Thailand and Hong Kong) wrapped in bamboo leaves, or other large leaves (lotus is one of the more commonly used leaves). You can find all sorts of different fillings in the rice: pork, roast pork, chestnut, egg, salted egg, mushroom, red bean, or just simply without filling. They could be just white rice dumpling (not pre-fried), or brown (pre-fried with soya sauce).
Nowadays, you can buy Zongzi almost everyday of the year, in restaurants or hawker stores in most oriental countries such as China, Hong Kong, Taiwan, Malaysia and Singapore, and other Asian countries where large amount of Chinese reside.