diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,19 @@
 Changelog
 =========
 
+Version 0.2.1.0
+---------------
+
+*November 5, 2019*
+
+<https://github.com/mstksg/advent-of-code-api/releases/tag/v0.2.1.0>
+
+*   Export `Day` constructor from *Advent*
+
 Version 0.2.0.0
 ---------------
 
-*November 3, 2019*
+*November 4, 2019*
 
 <https://github.com/mstksg/advent-of-code-api/releases/tag/v0.2.0.0>
 
diff --git a/advent-of-code-api.cabal b/advent-of-code-api.cabal
--- a/advent-of-code-api.cabal
+++ b/advent-of-code-api.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 9e35c93b909c0ae1a536d52a0eb26455a393d111063a82c5cc5577f4fab16c13
+-- hash: f51e9b48698efac660670dda90b5dde485ef32d93c840c461ae834599d86bc30
 
 name:           advent-of-code-api
-version:        0.2.0.0
+version:        0.2.1.0
 synopsis:       Advent of Code REST API bindings and servant API
 description:    Haskell bindings for Advent of Code REST API and a servant API.  Please use
                 responsibly! See README.md or "Advent" module for an introduction and
diff --git a/src/Advent.hs b/src/Advent.hs
--- a/src/Advent.hs
+++ b/src/Advent.hs
@@ -47,6 +47,7 @@
   -- * API
     AoC(..)
   , Part(..)
+  , Day(..)
   , AoCOpts(..)
   , SubmitRes(..), showSubmitRes
   , Leaderboard(..), LeaderboardMember(..)