Just shutting down for a month like many companies in parts of Europe is great. Means you don’t even have “time off work”, it means work doesn’t exist because no one else works either. You return after (at least) a month to an empty inbox.
What happens is the Telcos declare a brown-out/embargo [1] (in 2018 it was from 20 Dec to 7 January). The companies the next level up will follow (because they won't be able to do some network changes) and then the next layer up and so on.
The vast majority of other people will take breaks around the same time. Depends on the industry and what people are doing of course. But with many workers away the buses will run on weekend timetables and many CBD cafes will close.
[1] https://sp.chorus.co.nz/product-update/protecting-chorus-net... and https://www.telarus.com.au/news/month/nov/telco-embargoes-ma...