+
+-- |Convert a 'ZonedTime' to RFC 1123 date and time string.
+toAsciiBuilder ∷ ZonedTime → AsciiBuilder
+toAsciiBuilder zonedTime
+ = let localTime = zonedTimeToLocalTime zonedTime
+ timeZone = zonedTimeZone zonedTime
+ (year, month, day) = toGregorian (localDay localTime)
+ (_, _, week) = toWeekDate (localDay localTime)
+ timeOfDay = localTimeOfDay localTime
+ in
+ shortWeekDayName week
+ ⊕ A.toAsciiBuilder ", "
+ ⊕ show2 day
+ ⊕ A.toAsciiBuilder " "
+ ⊕ shortMonthName month
+ ⊕ A.toAsciiBuilder " "
+ ⊕ show4 year
+ ⊕ A.toAsciiBuilder " "
+ ⊕ show2 (todHour timeOfDay)
+ ⊕ A.toAsciiBuilder ":"
+ ⊕ show2 (todMin timeOfDay)
+ ⊕ A.toAsciiBuilder ":"
+ ⊕ show2 (floor (todSec timeOfDay) ∷ Int)
+ ⊕ A.toAsciiBuilder " "
+ ⊕ untag (cs timeZone ∷ Tagged RFC822 AsciiBuilder)