_config.yml is this:

...
timezone: America/New_York
...
permalink: :year/:month/:day/:title/
...

and source/_posts/test.md is this:

---
title: test
date: 2018-10-11 23:00:00
tags:
---

The permalink of this article should be /2018/10/11/test/. But hexo generate in Japan, which +0900, /2018/10/12/test/index.html is generated.

The article date is correct (2018/10/11).

Change the machine timezone to -0500 and hexo generate, /2018/10/11/test.index.html is generated.

It seems that the permalink is not generated correctly if the time zone of _config.yml and the time zone setting of the machine are incorrect.