diff --git a/src/local-time.lisp b/src/local-time.lisp
index 5cd3de2c..678ce400 100644
--- a/src/local-time.lisp
+++ b/src/local-time.lisp
@@ -1557,8 +1557,9 @@ The value of this variable should have the methods `local-time::clock-now', and
                          (allow-missing-date-part allow-missing-elements)
                          (allow-missing-time-part allow-missing-elements)
                          (allow-missing-timezone-part allow-missing-elements)
-                         (offset 0))
-  "Parse a timestring and return the corresponding TIMESTAMP. See split-timestring for details. Unspecified fields in the timestring are initialized to their lowest possible value, and timezone offset is 0 (UTC) unless explicitly specified in the input string."
+                         (offset 0)
+                         (timezone *default-timezone*))
+  "Parse a timestring and return the corresponding TIMESTAMP. See split-timestring for details. Unspecified fields in the timestring are initialized to their lowest possible value, and timezone offset is 0 (UTC) unless explicitly specified in the input string. If offset is nil, default timezone is used, or the timezone provided by the timezone keyword."
   (let ((parts (%split-timestring (coerce timestring 'simple-string)
                                   :start (or start 0)
                                   :end (or end (length timestring))
@@ -1584,7 +1585,8 @@ The value of this variable should have the methods `local-time::clock-now', and
          :offset (if offset-hour
                      (+ (* offset-hour 3600)
                         (* (or offset-minute 0) 60))
-                     offset))))))
+                     offset)
+         :timezone timezone)))))
 
 (defun ordinalize (day)
   "Return an ordinal string representing the position of DAY in a sequence (1st, 2nd, 3rd, 4th, etc)."
diff --git a/test/timezone.lisp b/test/timezone.lisp
index f2a1c68f..f5b5b7c5 100644
--- a/test/timezone.lisp
+++ b/test/timezone.lisp
@@ -69,6 +69,20 @@
          (new (timestamp+ old 24 :hour eastern-tz)))
     (is (= (* 24 60 60) (timestamp-difference new old)))))
 
+(deftest test/timezone/parse-timestring-different-timezones ()
+   (let ((*default-timezone* eastern-tz))
+     (is (timestamp=
+          (parse-timestring "2016-12-01" :offset nil)                               ;; Use default timezone
+          (parse-timestring "2016-12-01" :offset (* 60 60 -5))                      ;; Ignore timezone 
+          (parse-timestring "2016-12-01" :offset (* 60 60 -5) :timezone utc-leaps)  ;; Ignore timezone
+          (parse-timestring "2016-12-01" :offset nil :timezone eastern-tz)          ;; Use timezone
+          (adjust-timestamp (parse-timestring "2016-12-01" :offset nil :timezone utc-leaps) (offset :hour +5)) ;; Use different timezone
+          ;; Rest use timezone from timestring
+          (parse-timestring "2016-12-01T00:00:00-05:00")
+          (parse-timestring "2016-12-01T00:00:00-05:00" :offset 0)
+          (parse-timestring "2016-12-01T00:00:00-05:00" :offset -10)
+          (parse-timestring "2016-12-01T00:00:00-05:00" :offset nil :timezone utc-leaps)))))
+
 (deftest test/timezone/timestamp-minimize-part ()
   (is (timestamp=
        (timestamp-minimize-part