Date to mysql datetime

General
4

What version of node-red are you on? earlier versions do not have access to momentjs.
please also supply a copyable array example of incoming data. as i have guessed what it is.
[edit]
when you update your node-red this jsonata expression should get you the result you need.

$map($$.payload, function($v,$i){
       {$moment($$.date_time).add($i*30,"minutes").tz("UTC").format("YYYY/MM/DD HH:mm:ss"): $v}
})

[edit] This expression should work with older versions of node-red

$map(
   $$.payload,
   function($v,$i){
       {
           $join(
               $split(
                   $fromMillis($toMillis($$.date_time)+(1800000*$i)),
                   /\.|T/
               )[[0..1]],
               " "
           ): $v
       }
}
)