Germany

 

德国

 

Don't stare: "You'd appear either uneducated or mentally ill."

 

Don't be overly friendly: "Germans like to gradually warm up to people and take time to really get to know them before acting like BFFs."

 

Don't wish someone a happy birthday before the actual day: "The origin is a superstition that something bad will happen to them (they might die) before their birthday if you do, however this rule is not limited to superstitious people. Even bright, rational Germans will feel uncomfortable because it's just not done."