In Germany that exists as well, we get “holiday money” some time in late spring/early summer and “Christmas money” which we get in November. Both of them add up to a full month’s salary together, so it’s essentially 13 salaries/year
To be fair, usually you get that when you are already employed somewhere with good working conditions and an above average salary. Eg Daiichi Sankyo does that with technical assistants, but they already have a great starting salary of roughly 43k with no job experience. That’s much higher than other companies pay their TAs (Eurofins paid 22k to new TAs), and these companies pat themselves on the back for giving you a punch on a 30 minute Christmas themed extra break as a holiday treat.