Frontmatter dates a day off?

[reallymello]

In my post if I have a frontmatter like

---
title: Chronoblog is amazing
cover: ./chrono.png
date: 2020-01-14
description: Dates are a day behind
tags: ['post']
---

The date will show as January 13th instead of the 14th. Is this expected behavior or an off by 1 or internationalization defect?

[ganevdev]

To show the date, chronoblog uses this component:

https://github.com/Chronoblog/gatsby-theme-chronoblog/blob/master/packages/gatsby-theme-chronoblog/src/components/date.js

It is very simple and uses the usual javascript tools.

I think the problem is in time zones. In general, of course, we must make sure that the specified date is displayed - since we are making a static string from the date.

Here is a function from a component that can be run in isolation (in nodejs for example), I added a time zone option to it:

const makeDate = (
  date,
  language = 'en',
  options = {
    year: 'numeric',
    month: 'long',
    day: 'numeric',
    //timeZone: 'America/New_York',
    timeZone: 'Asia/Shanghai',
  }
) => {
  if (!date) return undefined;
  const newDate = new Date(date);
  const dateString = newDate.toLocaleString(language, options);
  return dateString;
};

console.log(makeDate(new Date('2020-01-15')));

With different time zones, it gives different dates (if today's date is indicated).