German culture varies by region, but a handful of broadly shared norms hold across most of the country.
Punctuality is a genuine expectation. Arriving on time for anything from a business meeting to a dinner invitation matters, and even a few minutes late is worth a brief apology.
Directness is normal, not rudeness. Germans generally communicate more bluntly than many cultures find comfortable at first — a direct opinion or correction is not meant as hostile, just efficient.
Jaywalking is frowned upon. Crossing against a red pedestrian light, even with no traffic present, draws real disapproval, especially with children nearby.
Sundays are for rest, by both law and custom — shops close nationwide, and loud activities are restricted in many residential areas.
Formal address matters. The formal 'Sie' is expected with strangers and in business settings until you are invited to switch to the informal 'du' — a small but noticed courtesy.
Finally, take beer garden culture seriously as a social institution rather than just a place to drink. A proper session at a long communal table, especially in Bavaria, is one of the most reliable ways to see a German town as it actually is.