diff --git a/.formatter.exs b/.formatter.exs
index 2bed17c..d2cda26 100644
--- a/.formatter.exs
+++ b/.formatter.exs
@@ -1,3 +1,4 @@
+# Used by "mix format"
 [
-  inputs: ["mix.exs", "{config,lib,test}/**/*.{ex,exs}"]
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
 ]
diff --git a/.gitignore b/.gitignore
index 2f7551c..ae6b04a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,12 +8,8 @@
 # The directory Mix downloads your dependencies sources to.
 /deps/
 
-# Where 3rd-party dependencies like ExDoc output generated docs.
+# Where third-party dependencies like ExDoc output generated docs.
 /doc/
-/docs/
-
-# Temp files
-/tmp/
 
 # Ignore .fetch files in case you like to edit your project deps locally.
 /.fetch
@@ -24,6 +20,13 @@ erl_crash.dump
 # Also ignore archive artifacts (built via "mix archive.build").
 *.ez
 
+# Ignore package tarball (built via "mix hex.build").
+holidefs-*.tar
+
+# Temporary files, for example, from tests.
+/tmp/
+
+# Misc.
 .DS_Store
 
 ### nix ###
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c88b54..a088464 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
 ## v0.3.8 - 2023-09-25
 
 ### Changed
@@ -96,4 +101,3 @@ https://github.com/holidays/definitions/tree/v2.3.0 tag
 - README usage section
 - Loading and handling of holiday definition files from http://github.com/holidays/definitions
 - Informal and observed options
-
diff --git a/LICENSE b/LICENSE.md
similarity index 98%
rename from LICENSE
rename to LICENSE.md
index 0c0df8f..11014ab 100644
--- a/LICENSE
+++ b/LICENSE.md
@@ -1,4 +1,4 @@
-MIT License
+# MIT License
 
 Copyright (c) 2018 Teamweek
 
diff --git a/README.md b/README.md
index aa25815..81c1fa3 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,10 @@
 # Holidefs
 
-[![Build Status](https://travis-ci.org/Teamweek/holidefs.svg?branch=master)](https://travis-ci.org/Teamweek/holidefs)
 [![Module Version](https://img.shields.io/hexpm/v/holidefs.svg)](https://hex.pm/packages/holidefs)
 [![Hex Docs](https://img.shields.io/badge/hex-docs-lightgreen.svg)](https://hexdocs.pm/holidefs/)
 [![Total Download](https://img.shields.io/hexpm/dt/holidefs.svg)](https://hex.pm/packages/holidefs)
-[![License](https://img.shields.io/hexpm/l/holidefs.svg)](https://github.com/Teamweek/holidefs/blob/master/LICENSE)
-[![Last Updated](https://img.shields.io/github/last-commit/Teamweek/holidefs.svg)](https://github.com/Teamweek/holidefs/commits/master)
+[![License](https://img.shields.io/hexpm/l/holidefs.svg)](https://github.com/toggl/holidefs/blob/master/LICENSE.md)
+[![Last Updated](https://img.shields.io/github/last-commit/toggl/holidefs.svg)](https://github.com/toggl/holidefs/commits/master)
 
 Definition-based national holidays in Elixir.
 
@@ -50,4 +49,4 @@ For the complete list of options and their meaning check
 
 Copyright (c) 2022 Toggl
 
-This software is released under the [MIT License](./LICENSE).
+This software is released under the [MIT License](./LICENSE.md).
diff --git a/dev/support/mix/tasks/holidefs.download.ex b/dev/support/mix/tasks/holidefs.download.ex
index f78b1fa..163d9d1 100644
--- a/dev/support/mix/tasks/holidefs.download.ex
+++ b/dev/support/mix/tasks/holidefs.download.ex
@@ -3,21 +3,22 @@ defmodule Mix.Tasks.Holidefs.Download do
 
   alias Holidefs.Definition
 
-  @shortdoc "Downloads the .yaml files with the calendar definitions"
+  @shortdoc "Downloads the .yaml files with the calendar definitions."
 
   @moduledoc """
   Downloads the definition files from https://github.com/holidays/definitions.
 
-  ## Example
+  ## Examples
 
     mix holidefs.download
 
   ## Command line options
 
     * `-l`, `--locale` - the locale code (or list of locale codes separated
-    by comma). All locales by default
+      by comma). All locales by default
+
     * `-c`, `--clean` - removes all locale files that are not needed anymore
-    before processing the list
+      before processing the list
 
   """
 
diff --git a/dev/support/mix/tasks/holidefs.gettext.extract.ex b/dev/support/mix/tasks/holidefs.gettext.extract.ex
index 154628b..7d9da6c 100644
--- a/dev/support/mix/tasks/holidefs.gettext.extract.ex
+++ b/dev/support/mix/tasks/holidefs.gettext.extract.ex
@@ -4,7 +4,7 @@ defmodule Mix.Tasks.Holidefs.Gettext.Extract do
   alias Holidefs.Definition
   alias Holidefs.Definition.Store
 
-  @shortdoc "Extracts a new .pot from the definition files"
+  @shortdoc "Extracts a new .pot from the definition files."
 
   @moduledoc """
   Extracts a new .pot from all the definition files we load
@@ -14,7 +14,7 @@ defmodule Mix.Tasks.Holidefs.Gettext.Extract do
   or add new translations to the existing ones. Execute the command
   `mix help gettext.merge` to check how.
 
-  ## Example
+  ## Examples
 
     mix holidefs.gettext.extract
 
diff --git a/lib/holidefs/date_calculator.ex b/lib/holidefs/date_calculator.ex
index cafaec7..c09c300 100644
--- a/lib/holidefs/date_calculator.ex
+++ b/lib/holidefs/date_calculator.ex
@@ -1,10 +1,10 @@
 defmodule Holidefs.DateCalculator do
   @moduledoc """
-  Some functions to calculate dynamic holiday dates
+  Some functions to calculate dynamic holiday dates.
   """
 
   @doc """
-  Returns the date of Easter for the given `year`
+  Returns the date of Easter for the given `year`.
 
   ## Examples
 
@@ -39,7 +39,7 @@ defmodule Holidefs.DateCalculator do
   end
 
   @doc """
-  Returns the date of Orthodox Easter for the given `year`
+  Returns the date of Orthodox Easter for the given `year`.
 
   ## Examples
 
@@ -75,7 +75,7 @@ defmodule Holidefs.DateCalculator do
   end
 
   @doc """
-  Returns the date of Orthodox Easter for the given `year`
+  Returns the date of Orthodox Easter for the given `year`.
 
   ## Examples
 
@@ -100,7 +100,7 @@ defmodule Holidefs.DateCalculator do
   end
 
   @doc """
-  Returns the nth day of the week
+  Returns the nth day of the week.
   """
   @spec nth_day_of_week(integer, integer, integer, integer) :: Date.t()
   def nth_day_of_week(year, month, -1, weekday) do
@@ -128,7 +128,7 @@ defmodule Holidefs.DateCalculator do
   end
 
   @doc """
-  Returns the next day of week after the given day
+  Returns the next day of week after the given day.
   """
   @spec next_day_of_week(Date.t(), integer) :: Date.t()
   def next_day_of_week(date, day_of_week) do
@@ -142,7 +142,7 @@ defmodule Holidefs.DateCalculator do
   end
 
   @doc """
-  Returns the previous day of week after the given day
+  Returns the previous day of week after the given day.
   """
   @spec previous_day_of_week(Date.t(), integer) :: Date.t()
   def previous_day_of_week(date, day_of_week) do
@@ -156,7 +156,7 @@ defmodule Holidefs.DateCalculator do
   end
 
   @doc """
-  Returns the first day of the given month on the given year
+  Returns the first day of the given month on the given year.
   """
   @spec beginning_of_month(integer, integer) :: Date.t()
   def beginning_of_month(year, month) do
diff --git a/lib/holidefs/definition.ex b/lib/holidefs/definition.ex
index 81227ec..61319ad 100644
--- a/lib/holidefs/definition.ex
+++ b/lib/holidefs/definition.ex
@@ -16,13 +16,13 @@ defmodule Holidefs.Definition do
         }
 
   @doc """
-  Returns the path for the given locale definition file
+  Returns the path for the given locale definition file.
   """
   @spec file_path(atom, Path.t()) :: binary
   def file_path(code, path \\ path()), do: Path.join(path, "#{code}.yaml")
 
   @doc """
-  Returns the path where all the locale definitions are saved
+  Returns the path where all the locale definitions are saved.
   """
   @spec path() :: Path.t()
   def path() do
diff --git a/lib/holidefs/definition/store.ex b/lib/holidefs/definition/store.ex
index 943ba9b..83d912f 100644
--- a/lib/holidefs/definition/store.ex
+++ b/lib/holidefs/definition/store.ex
@@ -8,13 +8,13 @@ defmodule Holidefs.Definition.Store do
   definitions = for {c, n} <- Holidefs.locales(), do: Definition.load!(c, n)
 
   @doc """
-  Returns all the loaded definitions with their rules
+  Returns all the loaded definitions with their rules.
   """
   @spec all_definitions :: [Holidefs.Definition.t()]
   def all_definitions, do: unquote(Macro.escape(definitions))
 
   @doc """
-  Returns the definitions for the given locale
+  Returns the definitions for the given locale.
   """
   @spec get_definition(Holidefs.locale_code()) :: Holidefs.Definition.t() | nil
   for definition <- definitions do
diff --git a/lib/holidefs/holiday.ex b/lib/holidefs/holiday.ex
index db903a2..f474919 100644
--- a/lib/holidefs/holiday.ex
+++ b/lib/holidefs/holiday.ex
@@ -21,7 +21,7 @@ defmodule Holidefs.Holiday do
         }
 
   @doc """
-  Returns a list of holidays for the definition rule on the given year
+  Returns a list of holidays for the definition rule on the given year.
   """
   @spec from_rule(atom, Holidefs.Definition.Rule.t(), integer, Holidefs.Options.t()) :: [t]
   def from_rule(code, %Rule{year_ranges: year_ranges} = rule, year, opts \\ %Options{}) do
@@ -133,7 +133,7 @@ defmodule Holidefs.Holiday do
   end
 
   @doc """
-  Returns the translated name of the given holiday
+  Returns the translated name of the given holiday.
   """
   @spec translate_name(atom, String.t()) :: String.t()
   def translate_name(code, name) do
diff --git a/lib/holidefs/options.ex b/lib/holidefs/options.ex
index 9f7a2c1..0542e21 100644
--- a/lib/holidefs/options.ex
+++ b/lib/holidefs/options.ex
@@ -2,13 +2,15 @@ defmodule Holidefs.Options do
   @moduledoc """
   Here is the list of options you can send to `Holidefs` functions:
 
-    * `regions` - a list of strings to define what region will be loaded. When
-    empty it fallbacks to the basic region of the locale, which is the region
-    with the same code of the locale. Defaults to `[]`
-    * `include_informal?` - flag to include the informal holidays on the
-    return list. Defaults to `false`
-    * `observed?` - flag to consider the `observed_date` of the holidays as
-    the `date`. Defaults to `false`
+    * `:regions` - a list of strings to define what region will be loaded. When
+      empty it fallbacks to the basic region of the locale, which is the region
+      with the same code of the locale. Defaults to `[]`
+
+    * `:include_informal?` - flag to include the informal holidays on the
+      return list. Defaults to `false`
+
+    * `:observed?` - flag to consider the `observed_date` of the holidays as
+      the `date`. Defaults to `false`
 
   """
 
diff --git a/mix.exs b/mix.exs
index 696614a..0d4536c 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,7 +1,7 @@
 defmodule Holidefs.Mixfile do
   use Mix.Project
 
-  @github_url "https://github.com/Teamweek/holidefs"
+  @github_url "https://github.com/toggl/holidefs"
   @version "0.3.8"
 
   def project do
@@ -47,7 +47,7 @@ defmodule Holidefs.Mixfile do
         "CHANGELOG.md": [],
         "CODE_OF_CONDUCT.md": [title: "Code of Conduct"],
         "CONTRIBUTING.md": [],
-        LICENSE: [title: "License"],
+        "LICENSE.md": [title: "License"],
         "README.md": [title: "Overview"]
       ],
       main: "readme",