Error when posting/creating datetime property (HTTP 400 error)

I noticed that the Hubspot tool don’t save properly so I reviewed again one by one to make sure everything was correct and now worked. But Even having as a datetime field I cannot add the time. So is almost useless to create it.

Yeah, you are right on that, manually setting it it still will not give you the option to set the time, just the date. I think if you try setting it via a workflow however with a timestamp it will insert the time as well. Example like this: