I just ran into this problem and now it can be done easily. This method only shows a date without time, in addition to saving the appropriate date lang format according to the user who printed the report.
<p t-field="o.your_datetime_field" t-field-options='{"widget": "date"}'/>
Warning: t-field-options
quotes must be exactly the same as I wrote, otherwise this line will not work.
I hope that this will help in the future to everyone who needs it.
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