Need Date and Time in a notification

Help needed on creating a notification message with date and time.
What is need is:
Rule:
triggers:

  • id: “1”
    configuration:
    thingUID: mqtt:topic:174b0f34af
    previousStatus: ONLINE
    status: OFFLINE
    type: core.ThingStatusChangeTrigger
    conditions: []
    actions:

  • inputs: {}
    id: “2”
    configuration:
    type: application/vnd.openhab.dsl.rule
    script: |-2
    var message = “ESP32 not online”
    (var or val ?) var when = Date? + Time ?
    var icon = “temperature”
    var severity = HIGH"

    sendNotification("someone@yahoo.com", message  + **when** )
    sendBroadcastNotification(message)
    sendLogNotification(message)
    
    
    sendNotification("someone@yahoo.com", message, icon, severity)
    sendBroadcastNotification(message, icon, severity)
    sendLogNotification(message, icon, severity)
    

    type: script.ScriptAction

message + now.toString