date-fns-timezone 给出错误的结果？

Question

Right now it's Sunday Aug 30, 2020 5:20pm PST.

If I run this:

import {formatToTimeZone } from 'date-fns-timezone';
const dateNow = new Date();
const timeFormattedForUserTimezone = formatToTimeZone(dateNow, 'h:mm A z, MMM do, YYYY', {timeZone:'Europe/Berlin'})

...I get this in timeFormattedForUserTimezone :

2:20 AM CEST, Aug 1st, 2020

Google disagrees and tells me the time in Berlin is:

2:23 AM August 31, 2020

...ie Aug 31st rather than Aug 1st.

What am I missing?

Answer 1

Your time string is 'h:mm A z, MMM do, YYYY' which uses do which is Day of week .

Use 'h:mm A z, MMM Do, YYYY' instead (Note the upper case D in Do which stands for Day of month ).

Docs here: https://github.com/prantlf/date-fns-timezone/blob/master/docs/API.md#formattotimezone

So your code becomes:

import {formatToTimeZone } from 'date-fns-timezone';
const dateNow = new Date();
const timeFormattedForUserTimezone = formatToTimeZone(dateNow, 'h:mm A z, MMM Do, YYYY', {timeZone:'Europe/Berlin'})