DateTime Format to string?

Here: Calendar — Elixir v1.20.2

There‘s also a standalone strftime implemention:
https://github.com/plataformatec/nimble_strftime

Most things calendar did found it‘s way into elixir core in the last few versions, so I tend to suggest it (as well as timex) less and less.

I would use the Calendar library (mentioned earlier in this thread) with the strftime function to customize the DateTime formats however you like.

How about a format like 20191101T17:01:58+0000 - I derived this in PHP using Ymd\TH:i:sO format.

Can you elaborate?

How would you format it though?

@kujua I went with the Calendar module. The inbuilt one seemed pretty simple and didn’t do diffs, etc. Thanks for everyone’s help!

Erlang’s calendar is also good, I use it to get string dates with flexible format like that:

defmodule Util.Time do
  @moduledoc """
  Time helper functions.
  """

  @doc """
  Get current time as string using Erlangs calendar module.
  """
  @spec now_to_string() :: String
  def now_to_string() do
    {{year, month, day}, {hour, minute, second}} = :calendar.local_time()
    "#{day}.#{month |> zero_pad}.#{year} #{hour |> zero_pad}:#{minute |> zero_pad}:#{second |> zero_pad}"
  end

  @spec zero_pad(Integer, Integer) :: String
  defp zero_pad(number, amount \\ 2) do
     number
     |> Integer.to_string
     |> String.rjust(amount, ?0)
  end

end

Sorry for being not clear - was a long evening yesterday

The mix file has a dependency {:calendar, “~> 0.16.0”}
Starting in the directory where the file resides: iex -S mix. This will load all dependencies.

As @sztosz rightly says this is the library https://github.com/lau/calendar which has more features than the built-in one in 1.3. Also, version 0.16.0 only works with Elixir 1.3, because it accepts the built-in calendar 1.3 types.

I just realized @kujua were talking about a third party library GitHub - lau/calendar: date-time and time zone handling in Elixir · GitHub, and not about the Elixir’s standard library Calendar http://elixir-lang.org/docs/stable/elixir/Calendar.html. I think he should mention about what library he was writing in his response, to avoid confusion.