[Feature] 13665 date time format not respected

[``* `#13665` Date/Time format not respected``](https://www.openproject.org/work_packages/13665)
[``* `#13664` Timezone not respected``](https://www.openproject.org/work_packages/13664)
I think we should either use ``replace:true`` or just bind to attributes, so that we don't have ``<time>``-tags in the mark up