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unmillis

Converts millisecond-precision UNIX timestamps to the more human-readable and as-precise RFC3339 form.

Examples:

$ # can't remember what you did on the 1640995200000th?
$ unmillis 1640995200000th
2022-01-01T00:00:00+00:00
$ unmillis -1000
1969-12-31T23:59:59+00:00
$ unmillis 1
1970-01-01T00:00:00.001+00:00
$ unmillis 1000,  # garbage characters will be ignored
1970-01-01T00:00:01+00:00

Installation

Homebrew

brew tap joar/unmillis
brew install unmillis

Pre-built binaries

Binaries for macOS, Linux, and Windows can be downloaded from releases.

cargo

if you have cargo, you can run

cargo install unmillis

Usage

See tests/cmd/unmillis.md for more examples of both happy and unhappy usage patterns.

USAGE:
    unmillis <TIMESTAMP_MILLIS>

ARGS:
    <TIMESTAMP_MILLIS>    A timestamp formulated as the number of milliseconds since "1970-01-
                          01T00:00:00+00:00".
                           • Trailing and leading garbage is thrown away, i.e.
                           • `1 hello there`, `1,` and `"1",` would all be interpreted as `1`.
                           • Negative numbers are fine, positive numbers are ok too, both have
                          some limitations:
                           • We can't construct datetimes outside the range of (-262144-01-
                          01T00:00:00Z, +262143-12-31T23:59:59.999999999Z), so
                           • we only accept input values in the range of (-8334632851200000,
                          8210298412799999)

OPTIONS:
        --help       Print help information
        --version    Print version information