I think that is a german thing. The 25.12, 26.12 and 1.1 are bank holidays, add the weekends and you only need a few vacation days to get 9 days of. Some companies, e.g. my current one, make this vacation mandatory.
"Between the years" comes from the christian church, the church year ends with christmas and starts with the three holy kings day (however that is translated to english), but is currently mostly used for this one week between christmas and first of january.
"Between the years" comes from the christian church, the church year ends with christmas and starts with the three holy kings day (however that is translated to english), but is currently mostly used for this one week between christmas and first of january.