十二月

例句：

1. 1. The holiday season begins in December.
   假期季节始于十二月。
2. 2. December is the busiest month of the year for shopping.
   十二月是一年中购物最繁忙的月份。
3. 3. Many people celebrate Christmas in December.
   许多人在十二月庆祝圣诞节。