I always heard as Xmas - particularly the big family Xmas - as the biggest trigger stressor for divorce.
Everyone here is taking one or two two holidays a year with their partner, as well as several long weekends and all the statutory holidays such as Xmas, Easter etc, yet divorce seems broadly comparable across the globe. Even if a few of those are only lazing in the back garden or redecorating the lviing room.
Being prevented from doing any of that with partner by an employer in the dark ages would also be a divorce stressor. If one partner takes a job with shite holiday provision, the other - also used to civilised holiday provision - is likely to end up resentful, no?