I took two online courses this winter holiday.

这个寒假我上了两门网络课程。

youdao

I believe you will know a lot about Chinese traditions this winter holiday, such as the custom, practices, cuisine, greeting and so on.

我相信你会在这个寒假了解到中国的传统习俗，如风俗、菜肴、祝词等等。

youdao

This winter holiday, I went to Kunming with my family.

这个寒假，我和我的家人去了昆明。

youdao

An NPR holiday tradition celebrates two decades this winter: It's the 20th annual A Jazz Piano Christmas.

NPR: Twenty Years Of A Jazz Piano Christmas

Then my father went on a winter holiday to Cuba (my mother remarked on this with some surprise and maybe approval) and came back with a lingering sort of flu that caused the visits to lapse.

NEWYORKER: Gravel