The United States Postal Service (USPS) does not deliver mail on Sundays and on the following federal holidays:

• New Years Day (January 1)
• Martin Luther King Jr. Day (third Monday of January)
• Presidents Day (third Monday of February)
• Memorial Day (last Monday of May)
• Independence Day (July 4)
• Labor Day (first Monday of September)
• Columbus Day (second Monday of October)
• Veterans Day (November 11)
• Thanksgiving Day (fourth Thursday of November)
• Christmas Day (December 25)

If a holiday falls on a Sunday, USPS observes it on the following Monday. USPS delivers from Monday to Saturday in ordinary circumstances, and deliveries are made up until 5 PM. In some situations, deliveries may be made after 5 PM, especially if traffic delays or bad weather has slowed a mail carrier down. When this occurs, you can expect your mail to be later than normal. Sometimes, this will result in a non-delivery day, because the driver will not be able to finish their normal route. If this happens, the mail will be delivered the following day.