You can convert the timestamps in the change node using jsonata and moment function. e.g.
[{"id":"8d63e49.f8f8198","type":"inject","z":"8d22ae29.7df6d","name":"","props":[{"p":"payload","v":"","vt":"str"},{"p":"topic","v":"","vt":"string"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"str","x":70,"y":1800,"wires":[["13c1586b.5c3538"]]},{"id":"13c1586b.5c3538","type":"function","z":"8d22ae29.7df6d","name":"Get array date time","func":"var arrLastModDate = [];\n\narrLastModDate.push('2020-04-07T10:00:56.000Z');\narrLastModDate.push('2020-04-07T09:45:32.000Z');\narrLastModDate.push('2020-04-07T09:47:04.000Z');\narrLastModDate.push('2020-04-07T09:48:54.000Z');\narrLastModDate.push('2020-04-07T09:50:28.000Z');\n\nmsg.payload = arrLastModDate;\n\nreturn msg;","outputs":1,"noerr":0,"x":230,"y":1800,"wires":[["3bb419f.4559a66"]]},{"id":"3bb419f.4559a66","type":"change","z":"8d22ae29.7df6d","name":"","rules":[{"t":"set","p":"arrUpdateDate","pt":"msg","to":"$map(payload, function($v){\t$moment($v).tz(\"Asia/Tokyo\").format('YYYY-MM-DD HH:mm:ss') \t})","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":450,"y":1800,"wires":[["49e75bf9.5de18c"]]},{"id":"49e75bf9.5de18c","type":"debug","z":"8d22ae29.7df6d","name":"arrUpdateDate","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"arrUpdateDate","targetType":"msg","x":630,"y":1860,"wires":[]}]
