Columbus day is a federal holiday observed on the second Monday in October, marking the anniversary of the arrival of Christopher Columbus to the Americas.
每年十月第二个星期一是纪念哥伦布到达美洲的哥伦布日，属于联邦假日。
The second Monday in October is celebrated as Columbus day in the United States.
美国10月的第二个星期一是哥伦布的纪念日。
This is Columbus day, the second Monday in October, in the United States. It is a federal holiday. That means most federal offices are closed.
十月的第二个星期一是美国联邦假日“哥伦布日”，这意味着大多数联邦办公室会放假关闭。
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