diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-date-prototype.cpp b/jerry-core/ecma/builtin-objects/ecma-builtin-date-prototype.cpp
index 48080f0c1..e42bd2334 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-date-prototype.cpp
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-date-prototype.cpp
@@ -70,7 +70,7 @@ ecma_builtin_date_prototype_to_string (ecma_value_t this_arg) /**< this argument
   }
   else
   {
-    ret_value = ecma_date_value_to_string (*prim_num_p, ECMA_DATE_LOCAL);
+    ret_value = ecma_date_value_to_string (*prim_num_p);
   }
 
   ECMA_FINALIZE (prim_value);
@@ -1136,7 +1136,7 @@ ecma_builtin_date_prototype_to_utc_string (ecma_value_t this_arg) /**< this argu
   }
   else
   {
-    ret_value = ecma_date_value_to_string (*prim_num_p, ECMA_DATE_UTC);
+    ret_value = ecma_date_value_to_utc_string (*prim_num_p);
   }
 
   ECMA_FINALIZE (prim_value);
@@ -1170,7 +1170,7 @@ ecma_builtin_date_prototype_to_iso_string (ecma_value_t this_arg) /**< this argu
   }
   else
   {
-    ret_value = ecma_date_value_to_string (*prim_num_p, ECMA_DATE_UTC);
+    ret_value = ecma_date_value_to_iso_string (*prim_num_p);
   }
 
   ECMA_FINALIZE (prim_value);
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-date.cpp b/jerry-core/ecma/builtin-objects/ecma-builtin-date.cpp
index 12074b666..4ad6b6396 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-date.cpp
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-date.cpp
@@ -476,7 +476,7 @@ ecma_builtin_date_dispatch_call (const ecma_value_t *arguments_list_p __attr_unu
                   ecma_builtin_date_now (ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED)),
                   ret_value);
 
-  ret_value = ecma_date_value_to_string (*ecma_get_number_from_value (now_val), ECMA_DATE_LOCAL);
+  ret_value = ecma_date_value_to_string (*ecma_get_number_from_value (now_val));
 
   ECMA_FINALIZE (now_val);
 
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-helpers-date.cpp b/jerry-core/ecma/builtin-objects/ecma-builtin-helpers-date.cpp
index 38c47b3a1..292fd1071 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-helpers-date.cpp
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-helpers-date.cpp
@@ -22,6 +22,7 @@
 #include "ecma-objects.h"
 #include "ecma-try-catch-macro.h"
 #include "fdlibm-math.h"
+#include "lit-char-helpers.h"
 
 #ifndef CONFIG_ECMA_COMPACT_PROFILE_DISABLE_DATE_BUILTIN
 
@@ -912,38 +913,230 @@ ecma_date_insert_num_with_sep (ecma_string_t **str_p, /**< input/output string *
   ecma_date_insert_leading_zeros (str_p, num, length);
 } /* ecma_date_insert_num_with_sep */
 
+/**
+ * Common function to copy utf8 characters.
+ *
+ * @return next destination buffer position
+ */
+static lit_utf8_byte_t *
+ecma_date_value_copy_utf8_bytes (lit_utf8_byte_t *dest_p, /**< destination buffer */
+                                 const char *source_p) /**< source buffer */
+{
+  while (*source_p != LIT_CHAR_NULL)
+  {
+    *dest_p++ = (lit_utf8_byte_t) *source_p++;
+  }
+  return dest_p;
+} /* ecma_date_value_copy_utf8_bytes */
+
+/**
+ * Common function to generate fixed width, right aligned decimal numbers.
+ *
+ * @return next destination buffer position
+ */
+static lit_utf8_byte_t *
+ecma_date_value_number_to_bytes (lit_utf8_byte_t *dest_p, /**< destination buffer */
+                                 int32_t number, /**< number */
+                                 int32_t width) /**< width */
+{
+  dest_p += width;
+  lit_utf8_byte_t *result_p = dest_p;
+
+  do
+  {
+    dest_p--;
+    *dest_p = (lit_utf8_byte_t) ((number % 10) + (int32_t) LIT_CHAR_0);
+    number /= 10;
+  }
+  while (--width > 0);
+
+  return result_p;
+} /* ecma_date_value_number_to_bytes */
+
+/**
+ * Common function to get the 3 character abbreviation of a week day.
+ *
+ * @return next destination buffer position
+ */
+static lit_utf8_byte_t *
+ecma_date_value_week_day_to_abbreviation (lit_utf8_byte_t *dest_p, /**< destination buffer */
+                                          ecma_number_t datetime_number) /**< datetime */
+{
+  const char *abbreviations_p[8] =
+  {
+    "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "---"
+  };
+
+  int32_t day = (int32_t) ecma_date_week_day (datetime_number);
+
+  if (day < 0 || day > 6)
+  {
+    /* Just for safety, it should never happen. */
+    day = 7;
+  }
+
+  return ecma_date_value_copy_utf8_bytes (dest_p, abbreviations_p[day]);
+} /* ecma_date_value_week_day_to_abbreviation */
+
+/**
+ * Common function to get the 3 character abbreviation of a month.
+ *
+ * @return next destination buffer position
+ */
+static lit_utf8_byte_t *
+ecma_date_value_month_to_abbreviation (lit_utf8_byte_t *dest_p, /**< destination buffer */
+                                       ecma_number_t datetime_number) /**< datetime */
+{
+  const char *abbreviations_p[13] =
+  {
+    "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "---"
+  };
+
+  int32_t month = (int32_t) ecma_date_month_from_time (datetime_number);
+
+  if (month < 0 || month > 11)
+  {
+    /* Just for safety, it should never happen. */
+    month = 12;
+  }
+
+  return ecma_date_value_copy_utf8_bytes (dest_p, abbreviations_p[(int) month]);
+} /* ecma_date_value_month_to_abbreviation */
+
+/**
+ * The common 17 character long part of ecma_date_value_to_string and ecma_date_value_to_utc_string.
+ *
+ * @return next destination buffer position
+ */
+static lit_utf8_byte_t *
+ecma_date_value_to_string_common (lit_utf8_byte_t *dest_p, /**< destination buffer */
+                                  ecma_number_t datetime_number) /**< datetime */
+{
+  ecma_number_t year = ecma_date_year_from_time (datetime_number);
+  dest_p = ecma_date_value_number_to_bytes (dest_p, (int32_t) year, 4);
+  *dest_p++ = LIT_CHAR_SP;
+
+  ecma_number_t hours = ecma_date_hour_from_time (datetime_number);
+  dest_p = ecma_date_value_number_to_bytes (dest_p, (int32_t) hours, 2);
+  *dest_p++ = LIT_CHAR_COLON;
+
+  ecma_number_t minutes = ecma_date_min_from_time (datetime_number);
+  dest_p = ecma_date_value_number_to_bytes (dest_p, (int32_t) minutes, 2);
+  *dest_p++ = LIT_CHAR_COLON;
+
+  ecma_number_t seconds = ecma_date_sec_from_time (datetime_number);
+  dest_p = ecma_date_value_number_to_bytes (dest_p, (int32_t) seconds, 2);
+
+  return ecma_date_value_copy_utf8_bytes (dest_p, " GMT");
+} /* ecma_date_value_to_string_common */
+
+/**
+ * Length of string created by ecma_date_value_to_string
+ */
+#define ECMA_DATE_VALUE_TO_STRING_LENGTH 33
+
 /**
  * Common function to create a time zone specific string from a numeric value.
  *
  * Used by:
  *        - The Date routine.
  *        - The Date.prototype.toString routine.
- *        - The Date.prototype.toISOString routine.
+ *
+ * @return completion value
+ *         Returned value must be freed with ecma_free_completion_value.
+ */
+ecma_completion_value_t
+ecma_date_value_to_string (ecma_number_t datetime_number) /**< datetime */
+{
+  lit_utf8_byte_t character_buffer[ECMA_DATE_VALUE_TO_STRING_LENGTH];
+  lit_utf8_byte_t *dest_p = character_buffer;
+
+  datetime_number = ecma_date_local_time (datetime_number);
+
+  dest_p = ecma_date_value_week_day_to_abbreviation (dest_p, datetime_number);
+  *dest_p++ = LIT_CHAR_SP;
+
+  dest_p = ecma_date_value_month_to_abbreviation (dest_p, datetime_number);
+  *dest_p++ = LIT_CHAR_SP;
+
+  ecma_number_t day = ecma_date_date_from_time (datetime_number);
+  dest_p = ecma_date_value_number_to_bytes (dest_p, (int32_t) day, 2);
+  *dest_p++ = LIT_CHAR_SP;
+
+  dest_p = ecma_date_value_to_string_common (dest_p, datetime_number);
+
+  int32_t time_zone = (int32_t) (ecma_date_local_tza () + ecma_date_daylight_saving_ta (datetime_number));
+  *dest_p++ = (time_zone >= 0) ? LIT_CHAR_PLUS : LIT_CHAR_MINUS;
+
+  dest_p = ecma_date_value_number_to_bytes (dest_p, time_zone / 60, 2);
+  dest_p = ecma_date_value_number_to_bytes (dest_p, time_zone % 60, 2);
+
+  JERRY_ASSERT (dest_p - character_buffer == ECMA_DATE_VALUE_TO_STRING_LENGTH);
+
+  ecma_string_t *date_string_p = ecma_new_ecma_string_from_utf8 (character_buffer,
+                                                                 ECMA_DATE_VALUE_TO_STRING_LENGTH);
+
+  return ecma_make_normal_completion_value (ecma_make_string_value (date_string_p));
+} /* ecma_date_value_to_string */
+
+/**
+ * Length of string created by ecma_date_value_to_utc_string
+ */
+#define ECMA_DATE_VALUE_TO_UTC_STRING_LENGTH 29
+
+/**
+ * Common function to create a time zone specific string from a numeric value.
+ *
+ * Used by:
  *        - The Date.prototype.toUTCString routine.
  *
  * @return completion value
  *         Returned value must be freed with ecma_free_completion_value.
  */
 ecma_completion_value_t
-ecma_date_value_to_string (ecma_number_t datetime_num, /**<datetime */
-                           ecma_date_timezone_t timezone) /**< timezone */
+ecma_date_value_to_utc_string (ecma_number_t datetime_number) /**< datetime */
+{
+  lit_utf8_byte_t character_buffer[ECMA_DATE_VALUE_TO_UTC_STRING_LENGTH];
+  lit_utf8_byte_t *dest_p = character_buffer;
+
+  dest_p = ecma_date_value_week_day_to_abbreviation (dest_p, datetime_number);
+  *dest_p++ = LIT_CHAR_COMMA;
+  *dest_p++ = LIT_CHAR_SP;
+
+  ecma_number_t day = ecma_date_date_from_time (datetime_number);
+  dest_p = ecma_date_value_number_to_bytes (dest_p, (int32_t) day, 2);
+  *dest_p++ = LIT_CHAR_SP;
+
+  dest_p = ecma_date_value_month_to_abbreviation (dest_p, datetime_number);
+  *dest_p++ = LIT_CHAR_SP;
+
+  dest_p = ecma_date_value_to_string_common (dest_p, datetime_number);
+
+  JERRY_ASSERT (dest_p - character_buffer == ECMA_DATE_VALUE_TO_UTC_STRING_LENGTH);
+
+  ecma_string_t *date_string_p = ecma_new_ecma_string_from_utf8 (character_buffer,
+                                                                 ECMA_DATE_VALUE_TO_UTC_STRING_LENGTH);
+
+  return ecma_make_normal_completion_value (ecma_make_string_value (date_string_p));
+} /* ecma_date_value_to_utc_string */
+
+/**
+ * Common function to create a time zone specific string from a numeric value.
+ *
+ * Used by:
+ *        - The Date.prototype.toISOString routine.
+ *
+ * @return completion value
+ *         Returned value must be freed with ecma_free_completion_value.
+ */
+ecma_completion_value_t
+ecma_date_value_to_iso_string (ecma_number_t datetime_num) /**<datetime */
 {
   ecma_string_t *output_str_p;
-  ecma_number_t milliseconds;
 
-  if (timezone == ECMA_DATE_LOCAL)
-  {
-    datetime_num = ecma_date_local_time (datetime_num);
-    milliseconds = ecma_date_ms_from_time (datetime_num);
-    output_str_p = ecma_new_ecma_string_from_number (milliseconds);
-    ecma_date_insert_leading_zeros (&output_str_p, milliseconds, 3);
-  }
-  else /* ECMA_DATE_UTC */
-  {
-    milliseconds = ecma_date_ms_from_time (datetime_num);
-    output_str_p = ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY);
-    ecma_date_insert_num_with_sep (&output_str_p, milliseconds, LIT_MAGIC_STRING_Z_CHAR, 3);
-  }
+  ecma_number_t milliseconds = ecma_date_ms_from_time (datetime_num);
+  output_str_p = ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY);
+  ecma_date_insert_num_with_sep (&output_str_p, milliseconds, LIT_MAGIC_STRING_Z_CHAR, 3);
 
   ecma_number_t seconds = ecma_date_sec_from_time (datetime_num);
   ecma_date_insert_num_with_sep (&output_str_p, seconds, LIT_MAGIC_STRING_DOT_CHAR, 2);
@@ -969,7 +1162,7 @@ ecma_date_value_to_string (ecma_number_t datetime_num, /**<datetime */
   ecma_date_insert_num_with_sep (&output_str_p, year, LIT_MAGIC_STRING_MINUS_CHAR, 4);
 
   return ecma_make_normal_completion_value (ecma_make_string_value (output_str_p));
-} /* ecma_date_value_to_string */
+} /* ecma_date_value_to_iso_string */
 
 /**
  * Common function to get the primitive value of the Date object.
diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-helpers.h b/jerry-core/ecma/builtin-objects/ecma-builtin-helpers.h
index d5d8344df..a3cd4b96d 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-helpers.h
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-helpers.h
@@ -125,7 +125,9 @@ extern void ecma_date_insert_num_with_sep (ecma_string_t **str_p,
                                            lit_magic_string_id_t magic_str_id,
                                            uint32_t length);
 
-extern ecma_completion_value_t ecma_date_value_to_string (ecma_number_t datetime_num, ecma_date_timezone_t timezone);
+extern ecma_completion_value_t ecma_date_value_to_string (ecma_number_t datetime_num);
+extern ecma_completion_value_t ecma_date_value_to_utc_string (ecma_number_t datetime_num);
+extern ecma_completion_value_t ecma_date_value_to_iso_string (ecma_number_t datetime_num);
 extern ecma_completion_value_t ecma_date_get_primitive_value (ecma_value_t this_arg);
 
 #endif /* !CONFIG_ECMA_COMPACT_PROFILE_DISABLE_DATE_BUILTIN */
diff --git a/tests/jerry/date-construct.js b/tests/jerry/date-construct.js
index c66977028..463a6e2e5 100644
--- a/tests/jerry/date-construct.js
+++ b/tests/jerry/date-construct.js
@@ -74,5 +74,6 @@ catch (e)
 assert (typeof Date (2015) == "string");
 assert (typeof Date() != typeof (new Date ()));
 assert (Date (Number.NaN) == Date ());
+
 // Fixme: remove this case when Date() gives the current time.
-assert (Date (2015,1,2) == "1970-01-01T00:00:00.000");
+assert (Date (2015,1,2) == "Thu Jan 01 1970 00:00:00 GMT+0000");
diff --git a/tests/jerry/date-tostring.js b/tests/jerry/date-tostring.js
index 6880c0d05..9bcf0defe 100644
--- a/tests/jerry/date-tostring.js
+++ b/tests/jerry/date-tostring.js
@@ -20,8 +20,8 @@ assert (new Date (2015, 7, 1, 0, Infinity, 0) == "Invalid Date");
 assert (new Date (NaN, 1, 1, 0, 0, 0) == "Invalid Date");
 assert (new Date (2015, NaN, 1, 0, 0, 0) == "Invalid Date");
 assert (new Date (2015, 7, 1, 0, NaN, 0) == "Invalid Date");
-assert (new Date ("2015-02-13") == "2015-02-13T00:00:00.000");
-assert (new Date ("2015-07-08T11:29:05.023") == "2015-07-08T11:29:05.023");
+assert (new Date ("2015-02-13") == "Fri Feb 13 2015 00:00:00 GMT+0000");
+assert (new Date ("2015-07-08T11:29:05.023") == "Wed Jul 08 2015 11:29:05 GMT+0000");
 
 try
 {
@@ -34,6 +34,16 @@ catch (e)
   assert (e.message === "Incompatible type");
 }
 
+var date = new Date(0);
+assert (date.toString() === "Thu Jan 01 1970 00:00:00 GMT+0000");
+assert (date.toUTCString() === "Thu, 01 Jan 1970 00:00:00 GMT");
+assert (date.toISOString() === "1970-01-01T00:00:00.000Z");
+
+date = new Date("2015-08-12T09:40:20.000Z")
+assert (date.toString() === "Wed Aug 12 2015 09:40:20 GMT+0000");
+assert (date.toUTCString() === "Wed, 12 Aug 2015 09:40:20 GMT");
+assert (date.toISOString() === "2015-08-12T09:40:20.000Z");
+
 assert (new Date (NaN).toDateString () == "Invalid Date");
 assert (new Date ("2015-02-13").toDateString () == "2015-02-13");
 assert (new Date ("2015-07-08T11:29:05.023").toDateString () == "2015-07-08");
@@ -100,8 +110,8 @@ catch (e)
 }
 
 assert (new Date (NaN).toUTCString () == "Invalid Date");
-assert (new Date ("2015-07-16").toUTCString () == "2015-07-16T00:00:00.000Z");
-assert (new Date ("2015-07-16T11:29:05.023").toUTCString () == "2015-07-16T11:29:05.023Z");
+assert (new Date ("2015-07-16").toUTCString () == "Thu, 16 Jul 2015 00:00:00 GMT");
+assert (new Date ("2015-07-16T11:29:05.023").toUTCString () == "Thu, 16 Jul 2015 11:29:05 GMT");
 
 try
 {
@@ -129,7 +139,7 @@ catch (e)
 }
 
 date_time = new Date ("2015-07-08T11:29:05.023").toJSON ();
-assert (new Date (date_time) == "2015-07-08T11:29:05.023");
+assert (new Date (date_time).toISOString () == "2015-07-08T11:29:05.023Z");
 
 assert (typeof Date (2015) == "string");
 assert (typeof Date() != typeof (new Date ()));
@@ -138,7 +148,7 @@ assert (Date (2015, 1, 1) == (new Date ()).toString ());
 assert (Date (Number.NaN) == Date ());
 
 // Fixme: remove these cases when TZA and DST are supported.
-assert (new Date ("2015-07-08T11:29:05.023-02:00").toString() == "2015-07-08T13:29:05.023");
-assert (new Date ("2015-07-08T11:29:05.023-02:00").toLocaleString() == "2015-07-08T13:29:05.023");
+assert (new Date ("2015-07-08T11:29:05.023-02:00").toString () == "Wed Jul 08 2015 13:29:05 GMT+0000");
+assert (new Date ("2015-07-08T11:29:05.023-02:00").toLocaleString () == "Wed Jul 08 2015 13:29:05 GMT+0000");
 
 assert (new Date ("2015-07-08T11:29:05.023Z").toISOString() == "2015-07-08T11:29:05.023Z");