+ -- RFC822
+ , property ( fromAttempt (ca (Tagged "Sun, 06 Nov 94 08:49:37 GMT" ∷ Tagged RFC822 Ascii))
+ ≡ Just referenceZonedTime
+ )
+
+ , property ( (Tagged "Sun, 06 Nov 94 08:49:37 GMT" ∷ Tagged RFC822 Ascii)
+ ≡ cs referenceZonedTime
+ )
+ , property $ \zt → Just (untag zt) ≡ fromAttempt (ca (cs (untag (zt ∷ Tagged Cent20 ZonedTime))
+ ∷ Tagged RFC822 Ascii))
+