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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起源：四月愚人节的确切起源已不可考，不过很多人认为这个节日是起源于1582年前后的法国，在公历被引进之后——公历就是我们到今天还在使用的历法。

Origin: the exact origin of April Fool's day isn't known, but many think it began in France around 1582 with the introduction of the Gregorian calendar, which is the most widely used calendar today.

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他们同时也使用公历，也在新年时庆祝特殊的全国节日。

They also used a civil calendar and special national festivals were associated with the New Year time.

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