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. The LCID property is read/write.
Sets or returns an Integer value.
Setting Mail.LCID explicitly affects all contents of a mail, where Response.LCID affects a single content of a mail message.
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, Mailing.LCID, Response.LCID