diff --git a/solutions/elixir/leap/1/lib/year.ex b/solutions/elixir/leap/1/lib/year.ex
new file mode 100644
index 0000000..da45aad
--- /dev/null
+++ b/solutions/elixir/leap/1/lib/year.ex
@@ -0,0 +1,20 @@
+defmodule Year do
+  @doc """
+  Returns whether 'year' is a leap year.
+
+  A leap year occurs:
+
+  on every year that is evenly divisible by 4
+    except every year that is evenly divisible by 100
+      unless the year is also evenly divisible by 400
+  """
+  @spec leap_year?(non_neg_integer) :: boolean
+  def leap_year?(year) do
+    cond do
+      rem(year, 400) == 0 -> true
+      rem(year, 100) == 0 -> false
+      rem(year, 4) == 0 -> true
+      true -> false
+    end
+  end
+end