The LCID property specifies how dates, times, and currencies are formatted. LCIDs are not the same for each geographical locale. Some locales format dates as YY-MM-DD and some format dates as MM-DD-YYYY.
Sets or returns an Integer value.
Setting Mailing.LCID explicitly affects the default LCID for the mailing.
Response.LCID can be set multiple times in one content, and the date can be displayed each time; however, the codepage must be set once to show all the characters.
You can find locale integers at MSDN Library.
CodePage, Mail LCID, Response LCID