This article outlines different options to format fields inside a DocumentsCorePack or AutoMerge template. e.g.: Formatting date fields, format money-fields etc.
Requirements: DocumentsCorePack for MS CRM 2011 and 2013, AutoMerge for MS CRM 2011
The following table shows the different culture information for displaying the DATETIME() function for DocumentsCorePack templates (.docx).
If you want to change the date format of GroupCalendar, you only have to change the Culture-Info.
The Culture-Info represents information about a specific culture including the names of the culture, the writing system, and the calendar used, as well as access to culture-specific objects that provide information for common operations, such as formatting dates and sorting strings.