the Moon Festival or the Mid-Autumn Festival (on the 15th day of the 8th lunar month)
例句：中秋节在几月几日
Mid Autumn Festival in a few months a few days
2016年中秋节在公历 9月16日
The Mid Autumn Festival of 2016 in the Gregorian calendar in September 16th
2016年中秋节在农历八月十五日
2016 Mid Autumn Festival in August 15th
对话：
A:What’s the date of the Mid-Autumn Festival this year?
A:今年中秋节是几月几号?
B:Mid-Autumn Festival is September 15.
B:中秋节是9月15号。
范文：The Mid-Autumn is a very important Chinese festival. It falls on the 15th day of August. A few days before the festival, everyone in the family will help to make the house clean and beautiful. Lanterns will be hung in front of the house.
On the evening there will be a big family dinner. People who work far away from their homes will try to come back for the union . After dinner, people will light the lanterns which are usually red and round. Children will play with their own toy lanterns happily.
At night the moon is usually round and bright. People can enjoy the moon while eating moon-cakes which are the special food for this festival. They can look back on the past and look forward to the future together. It is said that there was a dragon in the sky. The dragon wanted to swallow up the moon. To protect the frighten the dragon away.