diff --git a/README.md b/README.md
new file mode 100644
index 0000000..faf6630
--- /dev/null
+++ b/README.md
@@ -0,0 +1,6 @@
+# Advent of Code 2015–
+
+Here all solved puzzles for [Advent of Code](https://adventofcode.com) are kept for reference. Most solutions are written in **Python**, but there are also solutions written in **Elixir**.
+
+* 2016–2020 are squashed in version control, so the original thoughts/rants about the solution are forgotten for future generations.
+* 2021 onwards will have each solution as a separate commit.