Question

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How to parse UNIX timestamps with luxon?

rated 0 times [ 24] [ 4] / answers: 1 / hits: 17727 / 3 Years ago, tue, march 9, 2021, 12:00:00

I tried to use the luxon library to move away from moment - to translate the 1615065599.426264 timestamp into an ISO date.

According to the Online Epoch Converter this corresponds to

GMT: Saturday, March 6, 2021 9:19:59.426 PM

Your time zone: Saturday, March 6, 2021 10:19:59.426 PM GMT+01:00

Relative: 3 days ago

Removing the decimal part gives the same result.

The code using luxon:

let timestamp = 1615065599.426264

console.log(luxon.DateTime.fromMillis(Math.trunc(timestamp)).toISO())

console.log(luxon.DateTime.fromMillis(timestamp).toISO())

<script src=https://moment.github.io/luxon/global/luxon.min.js></script>

This result is

1970-01-19T17:37:45.599+01:00

1970-01-19T17:37:45.599+01:00

It is suspiciously close to Unix Epoch (1970-01-01 00:00:00).

Where is my mistake?

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ryderalfonsos

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answered 3 Years ago zoiel · Accepted Answer

So called "Unix time" counts the number of seconds since 01.01.1970 whereas Luxon (and most things JavaScript) expects a value with a millisecond resolution.

Multiplying your value by 1000 will yield the expected result:

> let timestamp = 1615065599.426264

undefined

> new Date(timestamp).toJSON()

'1970-01-19T16:37:45.599Z'

> new Date(timestamp * 1000).toJSON()

'2021-03-06T21:19:59.426Z'