We would like to be able to change the date format for all projects. Or more general: a way to configure the Auto-Substitution settings through WorldServer.

In SDL Trados Studio, you can set e.g. the default date format via File > Options > Language Pairs > [language pair] > Translation Memory and Automated Translation > Auto-Substitution > Dates and Times. This setting, however, does not have any influence on projects created from a WorldServer wsxz export. It looks like the default Studio settings are overridden through settings in the wsxz package. However, there's no way to configure them in WorldServer. The only way to set the date format is to go into the Studio project settings (Language Pairs > [project language pair] > Translation Memory and Automated Translation > Auto-Substitution > Dates and Times) for each and every project created from a WorldServer wsxz export, which is kind of annoying.

There should be a way to configure this through WorldServer.