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Millis and Timestamp

Hi there!

Millis/Timestamp are returned when I ask for /closestrategy and for /quotes, but I can’t understand how they can be read.
I see… [1501621140000,100.0] in the first data… so the number 1501621140000 how can be used to know the day/month/year ? TIA (I’m not a programmer but just a “techie” so don’t be surprised if the question is very simple)


That timestamp number is the number of milliseconds elapsed since a certain set time point, usually called epoch if I’m not mistaken. I believe standard is Jan 1, 1970 00:00:00.

So you probably should search for ways to convert “milliseconds timestamp to datetime in your programming language of choice”. Or write what language/tool you intend to automate this process with, and perhaps we can help you further!

Edit: For practical demonstration


Correct! The timestamp returned is an epoch timestamp and you can find conversions in almost any programming language.
I know this type of format for datetimes is not the standard in JSON / REST, as it should follow the standard ISO 8601. Example: “2018-10-19T18:25:43.511Z” but … it might be faster in performance to deal with epoch timestamps than with the standard datetime format. What do you think?


@GAlbano76 - As @jesusbc mentioned, a timestamp is simply the number of seconds (milliseconds) since the unix epoch -> January 01, 1970 UTC.

Conversions to human-readable dates can be done as follows
(examples in Python, R and MS Excel):

import pandas as pd
pd.to_datetime(1501621140000, unit=‘ms’, utc=True)

R: (processes timestamps in seconds, divide ms by 1000)
as.POSIXct(1501621140000 / 1000, origin=“1970-01-01”, tz=“UTC”)

MS Excel:

  1. Enter your timestamp (1501621140000) in let’s say, cell A1

  2. Remember it’s seconds from 01-01-1970, so you need to:

  • Divide by 1000 to convert to seconds,
  • Then divide by 86,400 (the number of seconds in 1 calendar day)
  • Then add the date (January 01, 1970) to the result

… to get the date corresponding to the timestamp.

You can do this easily by pasting the following formula in a cell (in this case C1, with the timestamp in A1):

This will first give you a numeric value in your cell. You’ll need to convert the cell format to Date in Cell -> Format Cells, to get this:


Thanks everyone!

I use Excel 2007 VBA (and maybe I will use VB6 if I need to…) but I had to change the formula that you gave me (; instead of , ):

= (A1/1000)/86400+DATE(1970**;1;**1) OR = (A1 / 86400000) + 25569

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