12/30/2025
The postmark date is changing. Effective December 24, 2025, the United States Postal Service (USPS) will implement new rules clarifying that a postmark indicates the date of the first automated processing operation at a processing facility, which may be later than the date the mail was dropped off. This change means that the date displayed on a postmark does not necessarily align with the date the USPS first accepted possession of the item, which could affect the timing of mail deliveries and deadlines for important documents like tax returns.
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