Help! Everyday Etiquette in the U.K.: language on formal invitations

» raaksingh - language on formal invitations

Ever since we have been posted around the world, I find myself increasingly confused on the language to be used on formal invitations.
I would sincerely welcome reference to a book that could throw some clarity on how to word invitations in the name of an ambassador of a country for the national day of the country.
I have searched desperately under diplomatic etiquette but found nothing on wording an invitation for national day celebrations, a solemn but joyous event.
Thank you
Raka Singh

-- posted by raaksingh