BR-TMP-6: Dates in UBL must be written as YYYY-MM-DD
What it means
Dates in UBL must be written as YYYY-MM-DD.
How to fix it
Write the date as YYYY-MM-DD, for example 2026-11-30.
Official message
Datumsangaben in UBL müssen im Format JJJJ-MM-TT (YYYY-MM-DD) übermittelt werden.
Rule details
- Rule set
- XRechnung 3.0 rules (KoSIT): XRechnung 3.0.2 (rules 2.6.0) from KoSIT
- Severity
- Warning. A warning does not make the invoice invalid.
- Formats
- UBL only
To check invoices from your own software, use the API: see the API reference.
Related rules
- BR-TMP-2: The external document location (BT-124) must be an absolute URL
- BR-TMP-3: Gross and net price base quantities (BT-149) and unit codes (BT-150) must match
- BR-TMP-4: Each supporting document (BG-24) may have only one description (BT-123)
- BR-TMP-5: Each supporting document (BG-24) may have only one attached file (BT-125)
- BR-TMP-7: Dates in CII must carry format="102" and be written as YYYYMMDD