title: How locale dependent is SimpleDateFormat?
body: <p>I often create SimpleDateFormat with a patterns like <code>HH:mm:ss</code> or <code>yyyy-MM-dd</code> to output dates in a locale independant way. Since there is a also constructor taking an additional locale parameter I'm wondering if there are cases where such a format can be locale dependant, or if I should always specify Locale.ENGLISH or Locale.GERMANY. Lets assume that the timezone is set explicitly.</p>