我们在二月一日下午到达北京。

We arrive in Beijing on February first in the afternoon.

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你们什么时候到达北京？我们在二月一日的下午到达北京。

When do you arrive in Beijing? We arrive Beijing on February first in the afternoon.

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春节是在农历每年的一月一日，但在公历上，春节日期却不是固定的，大约在公历的一月下旬到二月上旬这个阶段。

The Spring festival is the first day of the first lunar month each year. However, the Spring festival does not have a fixed date on the Gregorian calendar.

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