diff --git a/ChangeLog.md b/ChangeLog.md
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--- /dev/null
+++ b/ChangeLog.md
@@ -0,0 +1,5 @@
+# Revision history for hashable-orphans
+
+## 0  -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright (c) 2017, davean
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of davean nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
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+import Distribution.Simple
+main = defaultMain
diff --git a/hashable-orphans.cabal b/hashable-orphans.cabal
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--- /dev/null
+++ b/hashable-orphans.cabal
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+-- Initial hashable-orphans.cabal generated by cabal init.  For further 
+-- documentation, see http://haskell.org/cabal/users-guide/
+
+name:                hashable-orphans
+version:             0
+synopsis:            Provides instances missing from Hashable.
+homepage:            https://oss.xkcd.com/
+license:             BSD3
+license-file:        LICENSE
+author:              davean
+maintainer:          oss@xkcd.com
+copyright:           davean 2017
+category:            Data
+build-type:          Simple
+extra-source-files:  ChangeLog.md
+cabal-version:       >=1.10
+description:         This package provides instances missing from <http://hackage.haskell.org/package/hashable hashable>, specificly ones for types from <http://hackage.haskell.org/package/time time> ('DiffTime', 'UTCTime') and <http://hackage.haskell.org/package/sorted-list sorted-list> at present.
+
+source-repository head
+  type: git
+  location: https://code.xkrd.net/davean/hashable-orphans.git
+
+library
+  hs-source-dirs:      src
+  default-language:    Haskell2010
+  exposed-modules:
+        Data.Hashable.Orphans     
+  build-depends:
+        base >=4.9 && <4.11
+      , hashable >= 1.2 && < 1.3
+      , sorted-list >= 0.2 && < 0.3
+      , time >= 1.6 && < 1.9
+
+      
diff --git a/src/Data/Hashable/Orphans.hs b/src/Data/Hashable/Orphans.hs
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--- /dev/null
+++ b/src/Data/Hashable/Orphans.hs
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+module Data.Hashable.Orphans () where
+
+import Data.Hashable (Hashable(hashWithSalt))
+import Data.Foldable
+import Data.SortedList
+import Data.Time
+
+instance Hashable DiffTime where
+  hashWithSalt s = hashWithSalt s . diffTimeToPicoseconds
+
+instance Hashable UTCTime where
+  hashWithSalt s (UTCTime (ModifiedJulianDay d) dt) =
+    hashWithSalt s (d, dt)
+
+instance Hashable a => Hashable (SortedList a) where
+  hashWithSalt s = hashWithSalt s . toList