Hi, ox-odt.el ignores `org-export-date-timestamp-format'.
Instead, it uses a variable `org-odt-use-date-fields', which maps /all/ dates to the styles "OrgDate1" and "OrgDate2". I'm not sure if these are meant to be customizable or not. In LO I'm able to change the style by clicking on the timestamp so probably the style has to be specified that way, somehow. Unfortunately, the undocumented `org-odt--format-timestamp' does not seem to support alternative formats, but again, this may be due to fact that dates are formatted in LO. I /might/ have time to look at this myself over the weekend, unless someone knows how to fix it. —Rasmus -- May contains speling mistake
