diff --git a/Duckling/Rules/CA.hs b/Duckling/Rules/CA.hs
index efa17871..e48a25ec 100644
--- a/Duckling/Rules/CA.hs
+++ b/Duckling/Rules/CA.hs
@@ -22,6 +22,7 @@ import qualified Duckling.Distance.CA.Rules as Distance
 import qualified Duckling.Numeral.CA.Rules as Numeral
 import qualified Duckling.Ordinal.CA.Rules as Ordinal
 import qualified Duckling.Temperature.CA.Rules as Temperature
+import qualified Duckling.TimeGrain.CA.Rules as TimeGrain
 import qualified Duckling.Volume.CA.Rules as Volume
 import Duckling.Types
 
@@ -45,7 +46,7 @@ langRules (Seal Quantity) = []
 langRules (Seal RegexMatch) = []
 langRules (Seal Temperature) = Temperature.rules
 langRules (Seal Time) = []
-langRules (Seal TimeGrain) = []
+langRules (Seal TimeGrain) = TimeGrain.rules
 langRules (Seal Url) = []
 langRules (Seal Volume) = Volume.rules
 langRules (Seal (CustomDimension _)) = []
diff --git a/Duckling/TimeGrain/CA/Rules.hs b/Duckling/TimeGrain/CA/Rules.hs
new file mode 100644
index 00000000..79cbac89
--- /dev/null
+++ b/Duckling/TimeGrain/CA/Rules.hs
@@ -0,0 +1,40 @@
+-- Copyright (c) 2016-present, Facebook, Inc.
+-- All rights reserved.
+--
+-- This source code is licensed under the BSD-style license found in the
+-- LICENSE file in the root directory of this source tree.
+
+
+{-# LANGUAGE GADTs #-}
+{-# LANGUAGE OverloadedStrings #-}
+
+module Duckling.TimeGrain.CA.Rules
+  ( rules ) where
+
+import Data.Text (Text)
+import Prelude
+import Data.String
+
+import Duckling.Dimensions.Types
+import qualified Duckling.TimeGrain.Types as TG
+import Duckling.Types
+
+grains :: [(Text, String, TG.Grain)]
+grains = [ ("segon (grain)", "seg(on)?s?", TG.Second)
+         , ("minuts (grain)", "min(ut)?s?", TG.Minute)
+         , ("hora (grain)", "h(or(a|es))?", TG.Hour)
+         , ("dia (grain)", "d(í|i)(a|es)", TG.Day)
+         , ("setmana (grain)", "setman(a|es)", TG.Week)
+         , ("mes (grain)", "mes(os)?", TG.Month)
+         , ("trimestre (grain)", "trimestres?", TG.Quarter)
+         , ("any (grain)", "anys?", TG.Year)
+         ]
+
+rules :: [Rule]
+rules = map go grains
+  where
+    go (name, regexPattern, grain) = Rule
+      { name = name
+      , pattern = [regex regexPattern]
+      , prod = \_ -> Just $ Token TimeGrain grain
+      }
diff --git a/duckling.cabal b/duckling.cabal
index 3468a0ba..dac7b3d2 100644
--- a/duckling.cabal
+++ b/duckling.cabal
@@ -785,6 +785,7 @@ library
                      -- TimeGrain
                      , Duckling.TimeGrain.AR.Rules
                      , Duckling.TimeGrain.BG.Rules
+                     , Duckling.TimeGrain.CA.Rules
                      , Duckling.TimeGrain.DA.Rules
                      , Duckling.TimeGrain.DE.Rules
                      , Duckling.TimeGrain.EN.Rules