diff --git a/config/config.exs b/config/config.exs
index 83f8b26b..37bf20e0 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -10,6 +10,9 @@ use Mix.Config
 config :shift73k,
   ecto_repos: [Shift73k.Repo]
 
+# Configure the time zone database
+config :elixir, :time_zone_database, Tzdata.TimeZoneDatabase
+
 # Custom application global variables
 config :shift73k, :app_global_vars,
   time_zone: "America/New_York",
diff --git a/lib/shift73k/util/dt.ex b/lib/shift73k/util/dt.ex
index 9287b4a5..31c8c0e8 100644
--- a/lib/shift73k/util/dt.ex
+++ b/lib/shift73k/util/dt.ex
@@ -2,9 +2,9 @@ defmodule Shift73k.Util.Dt do
   @app_vars Application.get_env(:shift73k, :app_global_vars, time_zone: "America/New_York")
   @time_zone @app_vars[:time_zone]
 
-  def ndt_to_local(%NaiveDateTime{} = ndt), do: Timex.to_datetime(ndt, @time_zone)
+  def ndt_to_local(%NaiveDateTime{} = ndt), do: DateTime.from_naive(ndt, @time_zone)
 
-  def format_dt_local(dt_local, fstr), do: Timex.format!(dt_local, fstr)
+  def format_dt_local({:ok, dt_local}, fstr), do: Calendar.strftime(dt_local, fstr)
 
   def format_ndt(%NaiveDateTime{} = ndt, fstr), do: ndt |> ndt_to_local() |> format_dt_local(fstr)
 end
diff --git a/lib/shift73k_web/live/user_management/index.ex b/lib/shift73k_web/live/user_management/index.ex
index 4fefe001..1b92e9b4 100644
--- a/lib/shift73k_web/live/user_management/index.ex
+++ b/lib/shift73k_web/live/user_management/index.ex
@@ -187,5 +187,5 @@ defmodule Shift73kWeb.UserManagementLive.Index do
     ]
   end
 
-  def dt_out(ndt), do: format_ndt(ndt, "{YYYY} {Mshort} {0D}, {h12}:{0m} {am}")
+  def dt_out(ndt), do: format_ndt(ndt, "%Y %b %d, %I:%M %p")
 end
diff --git a/mix.exs b/mix.exs
index 6b83d8a8..3bc90306 100644
--- a/mix.exs
+++ b/mix.exs
@@ -52,7 +52,7 @@ defmodule Shift73k.MixProject do
       {:bamboo, "~> 2.0"},
       {:bamboo_smtp, "~> 4.0"},
       {:scrivener_ecto, "~> 2.0"},
-      {:timex, "~> 3.6"}
+      {:tzdata, "~> 1.1"}
     ]
   end