It means "holy evening", and it comes every October 31, the evening before All Saints' Day.

它的意思是“神圣的夜晚”，在每年的10月31日，也就是万圣节前夜。

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We visit a local farm every October.

我们每年十月都会去当地的一个农场。

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Official NHS statistics are published every October.

官方的NHS统计数据每年10月发布。

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European skepticism about the vaccine comes as the Stockholm-based European Center for Disease Control and Prevention reports the number of deaths in Europe due to the H1N1 virus has been doubling every two weeks since mid-October.

VOA: standard.2009.11.25

Every October their slickly produced horrors scare up big money, and they are not alone.

ECONOMIST: Fear is booming

Westbridge Park in Stone is the venue for a food festival every October.

BBC: Westbridge Park plan is Stone food festival 'death knell'

To celebrate these prophetic creatures, Banner Elk, North Carolina, located near the Tennessee border, organises a Woolly Worm Festival every October.

BBC: In North Carolina, woolly worms predict winter weather