[krab]

In some parts of Europe (Czechia specifically but I heard it worked similarly in other countries), the standard is two full calendar months, so usually about ten weeks. Some candidates request three months and the employer usually can wait.

Because the previous employer will also have to wait for a new hire, he will not want to let you out much sooner. It works the other way round as well. The employer can't fire you with a shorter notice period, unless there was some criminal behavior.

[fanf2]

In Britain the notice period is usually one month, but in some cases (eg academia) it can be as long as three months. (I am currently in month 2 of my notice period…)