diff --git a/lib/pure/times.nim b/lib/pure/times.nim
index ef23c4cf9a..0ab14e1839 100644
--- a/lib/pure/times.nim
+++ b/lib/pure/times.nim
@@ -1090,29 +1090,42 @@ proc parseToken(info: var TimeInfo; token, value: string; j: var int) =
     info.year = value[j..j+3].parseInt()
     j += 4
   of "z":
+    info.isDST = false
     if value[j] == '+':
       info.timezone = 0 - parseInt($value[j+1]) * secondsInHour
     elif value[j] == '-':
       info.timezone = parseInt($value[j+1]) * secondsInHour
+    elif value[j] == 'Z':
+      info.timezone = 0
+      j += 1
+      return
     else:
       raise newException(ValueError,
         "Couldn't parse timezone offset (z), got: " & value[j])
-    info.isDST = false
     j += 2
   of "zz":
+    info.isDST = false
     if value[j] == '+':
       info.timezone = 0 - value[j+1..j+2].parseInt() * secondsInHour
     elif value[j] == '-':
       info.timezone = value[j+1..j+2].parseInt() * secondsInHour
+    elif value[j] == 'Z':
+      info.timezone = 0
+      j += 1
+      return
     else:
       raise newException(ValueError,
         "Couldn't parse timezone offset (zz), got: " & value[j])
-    info.isDST = false
     j += 3
   of "zzz":
+    info.isDST = false
     var factor = 0
     if value[j] == '+': factor = -1
     elif value[j] == '-': factor = 1
+    elif value[j] == 'Z':
+      info.timezone = 0
+      j += 1
+      return
     else:
       raise newException(ValueError,
         "Couldn't parse timezone offset (zzz), got: " & value[j])
@@ -1120,7 +1133,6 @@ proc parseToken(info: var TimeInfo; token, value: string; j: var int) =
     j += 4
     info.timezone += factor * value[j..j+1].parseInt() * 60
     j += 2
-    info.isDST = false
   else:
     # Ignore the token and move forward in the value string by the same length
     j += token.len
diff --git a/tests/stdlib/ttime.nim b/tests/stdlib/ttime.nim
index 39106f1e04..b28d8aecde 100644
--- a/tests/stdlib/ttime.nim
+++ b/tests/stdlib/ttime.nim
@@ -96,6 +96,10 @@ parseTest("2006-01-12T15:04:05Z-07:00", "yyyy-MM-dd'T'HH:mm:ss'Z'zzz",
 # RFC3339Nano = "2006-01-02T15:04:05.999999999Z07:00"
 parseTest("2006-01-12T15:04:05.999999999Z-07:00",
     "yyyy-MM-ddTHH:mm:ss.999999999Zzzz", "2006-01-12T22:04:05+00:00", 11)
+for tzFormat in ["z", "zz", "zzz"]:
+  # formatting timezone as 'Z' for UTC
+  parseTest("2001-01-12T22:04:05Z", "yyyy-MM-dd'T'HH:mm:ss" & tzFormat,
+      "2001-01-12T22:04:05+00:00", 11)
 # Kitchen     = "3:04PM"
 parseTestTimeOnly("3:04PM", "h:mmtt", "15:04:00")
 #when not defined(testing):