After upgrading to Service Pack 14, you might notice that email messages containing credit card date merge fields format dates differently than other date fields.
We are currently evaluating this issue for a fix in a future service pack.
Steps to Duplicate
1) Add Credit Card fields to the CMS Export Definition used in the email template 2) Create an email message using credit card date merge fields, such as expiration date, as well as other date fields, like revenue date added 3) Send the email message to a constituent with credit card information. 4) Notice that the credit card dates are formatted differently than the other dates.