Hah! Good question.
You could do something like this with an unreleased functionality called Munchtions. One might suggest that you can call up Marketo Support and get it enabled for your instance, but you didn't hear that from me!
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FORMAT
Formats a date/datetime value based on the format string. If the input value was null/empty/a non-date object, the input is returned as is.
Syntax:
##FORMAT(date or date time token, "format string")##
Examples:
##FORMAT({{system.date}},"m/d/Y")##
returns '01/01/2010' if today was 1st Jan 2010
##FORMAT({{lead.Created At}},"m/d/Y h:i a")##
returns '12/31/2012 11:30 am' assuming that was the created at time
##FORMAT({{lead.Created At}},"F")##
returns 'December' , assuming lead was created on 12/31/2012
Full table of available formats: http://php.net/manual/en/function.date.php
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So what you could do is have a Marketo-only field which is set through a Master Router program (check out my session recording video starting at 24:57) assigning the value of "Account Renewal Date (Localized)" based on whatever geographic/region proxies you have in the system.
The part that I'm skeptical about is the language-localized rendering of the month—I doubt you can do it. You'd have to do some crazy processing to get it to work (e.g., making three fields in Marketo where month is a separate field, then running smart campaign logic to translate the 12 months from English into each appropriate language), and I don't think that'd be worthwhile.
Cheers,
Edward Unthank | Founder, Etumos
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