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Asked: 2026-06-06T11:50:23+00:00

I have a UTC timestamp. I want to convert it into YYYY/MM/DD format in

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I have a UTC timestamp. I want to convert it into YYYY/MM/DD format in R.

For example, 1318394558766. I tried format command unsuccessfully.

Any help is appreciated.

Thanks!

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1 Answer

  1. Editorial Team

    You can use as.POSIXct or as.POSIXlt. However you have to know the origin date from which your number of milliseconds started.

    as.POSIXct(1318394558766/1000, origin='1970-01-01')

> unlist(as.POSIXlt(1318394558766/1000, origin='1970-01-01'))
    sec     min    hour    mday     mon    year    wday    yday   isdst 
 38.766  42.000  21.000  11.000   9.000 111.000   2.000 283.000   1.000 
>

    Then you can use format to get the desired YYYY/MM/DD:

    format(as.POSIXct(1318394558766/1000, origin='1970-01-01'), format='%Y/%m/%d')
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