NCMBScriptをつかって現在日時を取得するサンプル

date.js

const moment = require('moment')

module.exports = function(req, res) {

  const now = moment()
  var json = {
    date: now.format(),
    formatted: req.query.format ? now.format(req.query.format) : null
  }
  res.json(json)
}

ScriptRunner.cs

using NCMB;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Web;
using UnityEngine;

public class ScriptRunner : MonoBehaviour
{
    public void RunDateScript()
    {
        var script = new NCMBScript("date.js", NCMBScript.MethodType.GET);
        
        Dictionary<string, object> query = null;
        // フォーマットされたものが欲しい場合は query を渡す
        query = new Dictionary<string, object>{
            {"format", "YYYY/MM/DD"}
        };
        script.ExecuteAsync(header: null, body: null, query: query, callback: (byte[] result, NCMBException e) => {
            
            if (e == null) {
                var jsonString = Encoding.UTF8.GetString(result);
                var info = JsonUtility.FromJson<DateInfo>(jsonString);
                Debug.Log(info.date);
                Debug.Log(DateTime.Parse(info.date));
                Debug.Log(info.formatted);
            } else {
                Debug.LogError(e);
            }
        });
    }
}

[System.Serializable]
public class DateInfo {
    public string date;
    public string formatted;
}