I have those data:

    ".$row2['ecds_date']." <br>
    ".$tp->toDate($row2['ecds_date'], "relative")." <br>
    ".$tp->toDate($row2['ecds_date'], "long")."

Result:

Date is correctly saved in Unix forum. Manual checking:

What could be wrong?
Server time is correct (user timezone is not used)

Checked html code:
<span data-livestamp="1546988400">1 day ago</span>