When I roll out the new Dynamics 365 portal, especially for a demo, the first thing I want to do is to change the date format. Why? Because of this comprehensive map of all countries that use the MMDDYYYY date format:
In Dynamics 365 go to Portals > Portal Languages and open English record. Change the LCID to a locale with a suitable date format, e.g. 3081 for Australian, 2057 for United Kingdom, etc (see the full list here).
You’d still have to put up with ‘Z’ instead of ‘S’ and deal with colors not colours, but at least you won’t turn up for a meeting scheduled for 1/2/2018 on the 2nd of January.