Time conversion error

I encountered a problem this morning The business is Query the database to get the data then Convert the timestamp in the data Deposit in map Back in
No problem offline, no problem online Incorrect time conversion ··· such as Should be 00:10 Just turn it around 14:10…

Print
dateTime Is the timestamp in the database
Log.info(dateTime +“ = ”+ new Date(dateTime)+ new SimpleDateformatter(“HH:mm”))
What's printed out is
1631465400000 = Sun Sep 12 16:50:00 UTC 2021 = 16:50

The reason is that the time of the server itself is abnormal ·· …