People around the country need to mail their packages and letters soon if they want them to arrive to their loved ones by Christmas. That's according to United States Postal Service spokesman David Rupert.

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That priority mail needs to get to a mailbox by December 20th. Rupert says the busiest mailing day is December 15th. He expects 15-and-a-half-billion cards, letters and packages will have been delivered between Thanksgiving and New Year's Eve around the country.