Apply Date Format Odoo - Qweb Report
Custom Date Format
Probuse Admin
If you want to specify your own format of date in Odoo qweb report you have to use t-field-options on html tags.
Example:
<td><![CDATA[ ]]>: <span t-field="doc.payment_date" t-field-options='{"format": "d MMMM y"}'/></td>