Store datetime in UTC format now, and fix presentation of TZUTC. Also standardise message summaries on Notifications

app/Traits/MessageAttributes.php

@@ -59,9 +59,15 @@ trait MessageAttributes
 		return ($this->msg_src) ? $this->msg_src : $this->rebuildMessage();
 	}
 
+	/**
+	 * This is used to build our data in a timezone date, so that when exported, we include the right TZUTC
+	 *
+	 * @return Carbon
+	 */
 	public function getDateAttribute(): Carbon
 	{
-		return $this->datetime->utcOffset($this->tzoffset);
+		// Datetime is in utc, and tzoffset describes what that local time is
+		return $this->datetime->clone()->utcOffset($this->tzoffset);
 	}
 
 	public function getOriginAttribute(string $val=NULL): ?string