My wife and I have been working on time management for most of our marriage (>20 years). I have to admit that I am slightly obsessed about being on time. Timeliness is one of those traits, that is part of my “cultural software." Why? I grew up in Germany and timeliness matters more in Germany than most other countries.
Global Dexterity is a book about diagnosing cultural code. Author Andy Molinsky provides a great deal of rich anecdotes around behavior that is appropriate, understandable and (un)acceptable in various cultural contexts.