diff --git a/TESTS/test_datetime.py b/TESTS/test_datetime.py
index 27d9dc2..be754ed 100644
--- a/TESTS/test_datetime.py
+++ b/TESTS/test_datetime.py
@@ -6,7 +6,7 @@ from time import localtime, gmtime, strftime
 
 from wpylib.datetime0_idt import idatetime
 from wpylib.datetime import utime_to_iso
-
+from pprint import pprint
 
 
 def test_idt_01():
@@ -17,6 +17,12 @@ def test_idt_01():
   idt = idatetime(iidt)
   print "integer value          = %+18d" % idt.idt
   print "iso8601 format         = %s" % idt.str_iso8601()
+  R = idt.split_values()
+  print("split values:")
+  pprint(R.__dict__)
+
+  iidt_rejoined = idt.join_values(R)
+  print("iidt rejoined          = %+18d" % iidt_rejoined)
 
 
 def test_u2i_01():
diff --git a/datetime0_idt.py b/datetime0_idt.py
index 73c417d..01c3151 100644
--- a/datetime0_idt.py
+++ b/datetime0_idt.py
@@ -32,6 +32,7 @@ where:
 The time is always expressed in terms of UTC to eliminate ambiguity of
 time zone, daylight savings time, etc.
 CAVEAT: The resolution of the time is only on the order of millisecond.
+Linux OS, for example, allows resolution down to nanoseconds!
 
 This is a 17-decimal-digit integer, which fits in a 64-bit range (9.22e+18).
 
@@ -71,6 +72,26 @@ class idatetime(object):
     R.microsecond = R.millisecond * 1000
     return R
 
+  def join_values(self, R=None):
+    """Joins the values contained in data structure 'R' to create a
+    composite integer date.
+    This is the converse of function 'split_values'.
+    """
+    if R is None:
+      R = self.R
+    if hasattr(R, 'microsecond'):
+      millisecond = R.microsecond // 1000
+    elif hasattr(R, 'millisecond'):
+      millisecond = R.millisecond
+
+    return R.year   * 10000000000000 \
+         + R.month  * 100000000000 \
+         + R.day    * 1000000000 \
+         + R.hour   * 10000000 \
+         + R.minute * 100000 \
+         + R.second * 1000 \
+         + millisecond
+
   def to_datetime(self):
     """Converts the object value to standard python datetime object.
     """