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@@ -19,7 +19,7 @@ module Chronic
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     def self.scan_for_days(token)
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       if token.word =~ /^(\d*)(st|nd|rd|th)$/
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-        unless $1.to_i > 31
1
+        unless $1.to_i > 31 && $1.to_i < 1
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           return OrdinalDay.new(token.word.to_i)
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         end
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       end
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@@ -37,4 +37,4 @@ module Chronic
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     end
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   end
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-end
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\ No newline at end of file
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+end

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@@ -23,8 +23,9 @@ module Chronic
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     def self.scan_for_days(token, post_token)
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       if token.word =~ /^\d\d?$/
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-        unless token.word.to_i > 31 || (post_token && %w{am pm morning afternoon evening night}.include?(post_token))
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-          return ScalarDay.new(token.word.to_i)
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+        toi = token.word.to_i
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+        unless toi > 31 || toi < 1 || (post_token && %w{am pm morning afternoon evening night}.include?(post_token.word))
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+          return ScalarDay.new(toi)
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         end
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       end
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       return nil
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@@ -32,8 +33,9 @@ module Chronic
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     def self.scan_for_months(token, post_token)
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       if token.word =~ /^\d\d?$/
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-        unless token.word.to_i > 12 || (post_token && %w{am pm morning afternoon evening night}.include?(post_token))
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-          return ScalarMonth.new(token.word.to_i)
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+        toi = token.word.to_i
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+        unless toi > 12 || toi < 1 || (post_token && %w{am pm morning afternoon evening night}.include?(post_token.word))
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+          return ScalarMonth.new(toi)
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         end
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       end
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       return nil
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@@ -41,7 +43,7 @@ module Chronic
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     def self.scan_for_years(token, post_token)
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       if token.word =~ /^([1-9]\d)?\d\d?$/
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-        unless post_token && %w{am pm morning afternoon evening night}.include?(post_token)
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+        unless post_token && %w{am pm morning afternoon evening night}.include?(post_token.word)
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           return ScalarYear.new(token.word.to_i)
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         end
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       end
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@@ -71,4 +73,4 @@ module Chronic
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     end
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   end
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-end
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\ No newline at end of file
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+end