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PEPPOL-EN16931-F001 - Dates must use the YYYY-MM-DD format

Every date in the document, whatever its role (issue date, due date, period bounds, delivery date), must be written as a calendar date in the form YYYY-MM-DD. Time zones, timestamps and national formats are refused.

PEPPOL-EN16931-F001 - Dates must use the YYYY-MM-DD format

Every date in the document, whatever its role (issue date, due date, period bounds, delivery date), must be written as a calendar date in the form YYYY-MM-DD. Time zones, timestamps and national formats are refused. This is a Peppol BIS Billing 3.0 rule. It applies on top of the EN 16931 core standard, on invoices exchanged over the Peppol network.

DecimalsPeppol BIS 3.0 Error
This is a Peppol BIS Billing 3.0 rule. It applies on top of the EN 16931 core standard, on invoices exchanged over the Peppol network.

What this rule checks

Every date in the document, whatever its role (issue date, due date, period bounds, delivery date), must be written as a calendar date in the form YYYY-MM-DD. Time zones, timestamps and national formats are refused.

How to fix it

Rewrite the offending date element, for example cbc:IssueDate or cbc:DueDate, as 2026-07-13 with no time part and no offset.

Validate against this rule

This rule is part of EN 16931. Check your invoice with the validator that matches your format:

UBL / PeppolXRechnungFactur-X / ZUGFeRD

Related rules

BR-DEC-23Line net amount: max 2 decimalsBR-DEC-12Total without VAT: max 2 decimalsBR-DEC-14Total with VAT: max 2 decimalsBR-DEC-01Document allowance amount: max 2 decimalsBR-DEC-02Document allowance base amount: max 2 decimalsBR-DEC-05Document charge amount: max 2 decimals

Source: OpenPeppol BIS Billing 3.0 · Last verified: 2026-07-10

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