春节是中国的传统节日，通常在农历正月初一庆祝。这是一年中最重要的节日之一，也被称为中国新年。在春节期间，人们通常会拜祭祖先，与家人团聚，吃美食，放烟花炮竹，以及进行各种传统活动。

如果有人问你什么时候是春节，你可以用以下英语回答：

'When is Chinese New Year?'

'Chinese New Year, also known as Spring Festival, is usually celebrated on the first day of the Chinese lunar calendar, which falls between late January and mid-February.'

另外，也可以说：

'Spring Festival, or Chinese New Year, typically takes place on the first day of the lunar calendar, which varies each year but usually falls in late January or early February.'