Today (December 14th) marks the busiest mailing day of the year, according to USPS®.
More than 830 million pieces of mail are expected to be handled by the postal service, marking the beginning of a surge in post in the run-up to Christmas.
This total represents an increase of 40 per cent in mail volumes on USPS's usual daily average of 583 million.
The service also announced an increase in orders being placed online as they recorded a "dramatic increase in traffic to [the] website," according to USPS vice-president of sales Susan Plonkey.
She added that more than three million shipping labels are being printed off from home every day, as 41 million people use the postal service's online facilities to send their holiday mail.
Ms Plonkey also announced that USPS will be holding a behind-the-scenes look at the mailing process to mark today's anticipated surge in sent mail.
The event is due to take place at the Friendship Post Office in Washington DC.