距离某天还有多久

using UnityEngine;
using System.Collections;
using System;


public class test : MonoBehaviour {
    DateTime dt1;
    DateTime dt2;
    TimeSpan ts;
    public GameObject mObj;
    private UILabel mLab;
    // Use this for initialization
    void Start () {
        
     dt2 = new DateTime(2014,1,18);
     mLab = mObj.GetComponent<UILabel>();
    }
    
    // Update is called once per frame
    void Update () {
        dt1 = DateTime.Now;
        ts = dt1.Subtract(dt2);
        mLab.text = ts.ToString();
        Debug.Log(ts);
    }
}