USPS 2019 Holiday Domestic Shipping Deadlines
USPS Mail-by Dates (US Services)
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Dec. 19 – First-Class Mail
Service for standard-sized, single-piece envelopes and small packages weighing up to 13 ounces with delivery in 3 business days or less. -
Dec. 20 – Priority Mail
Domestic service in 1, 2 or 3 business days based on where the package is mailed and where it’s being sent