m_format
SimpleDateFormat m_format
Internal SimpleDateFormat object used to carry out the formatting work.
Note that we force the locale to English at this point. This is done
because it is not clear whether MPX date formats that contain the names
of the days of the week support localised day names, or just the
English names. To make things consistent and to ensure we generate
MPX files that can be moved between locales, we default to using the
English day names.