diff --git a/Lib/datetime.py b/Lib/datetime.py
--- a/Lib/datetime.py
+++ b/Lib/datetime.py
@@ -1479,15 +1479,17 @@
         return cls.utcfromtimestamp(t)
 
     @classmethod
-    def combine(cls, date, time):
+    def combine(cls, date, time, tzinfo=True):
         "Construct a datetime from a given date and a given time."
         if not isinstance(date, _date_class):
             raise TypeError("date argument must be a date instance")
         if not isinstance(time, _time_class):
             raise TypeError("time argument must be a time instance")
+        if tzinfo is True:
+            tzinfo = time.tzinfo
         return cls(date.year, date.month, date.day,
                    time.hour, time.minute, time.second, time.microsecond,
-                   time.tzinfo, fold=time.fold)
+                   tzinfo, fold=time.fold)
 
     def timetuple(self):
         "Return local time tuple compatible with time.localtime()."
diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py
--- a/Lib/test/datetimetester.py
+++ b/Lib/test/datetimetester.py
@@ -2117,11 +2117,18 @@
         self.assertRaises(TypeError, combine) # need an arg
         self.assertRaises(TypeError, combine, d) # need two args
         self.assertRaises(TypeError, combine, t, d) # args reversed
-        self.assertRaises(TypeError, combine, d, t, 1) # too many args
+        self.assertRaises(TypeError, combine, d, t, 1) # wrong tzinfo type
+        self.assertRaises(TypeError, combine, d, t, 1, 2)  # too many args
         self.assertRaises(TypeError, combine, "date", "time") # wrong types
         self.assertRaises(TypeError, combine, d, "time") # wrong type
         self.assertRaises(TypeError, combine, "date", t) # wrong type
 
+        # tzinfo= argument
+        dt = combine(d, t, timezone.utc)
+        #self.assertIs(dt.tzinfo, timezone.utc)
+        #dt = combine(d, t, tzinfo=timezone.utc)
+        #self.assertIs(dt.tzinfo, timezone.utc)
+
     def test_replace(self):
         cls = self.theclass
         args = [1, 2, 3, 4, 5, 6, 7]
diff --git a/Modules/_datetimemodule.c b/Modules/_datetimemodule.c
--- a/Modules/_datetimemodule.c
+++ b/Modules/_datetimemodule.c
@@ -4430,28 +4430,32 @@
 static PyObject *
 datetime_combine(PyObject *cls, PyObject *args, PyObject *kw)
 {
-    static char *keywords[] = {"date", "time", NULL};
+    static char *keywords[] = {"date", "time", "tzinfo", NULL};
     PyObject *date;
     PyObject *time;
+    PyObject *tzinfo = NULL;
     PyObject *result = NULL;
 
-    if (PyArg_ParseTupleAndKeywords(args, kw, "O!O!:combine", keywords,
+    if (PyArg_ParseTupleAndKeywords(args, kw, "O!O!|O:combine", keywords,
                                     &PyDateTime_DateType, &date,
-                                    &PyDateTime_TimeType, &time)) {
-        PyObject *tzinfo = Py_None;
-
-        if (HASTZINFO(time))
-            tzinfo = ((PyDateTime_Time *)time)->tzinfo;
+                                    &PyDateTime_TimeType, &time, &tzinfo)) {
+        if (tzinfo == NULL) {
+            if (HASTZINFO(time))
+                tzinfo = ((PyDateTime_Time *)time)->tzinfo;
+            else
+                tzinfo = Py_None;
+        }
         result = PyObject_CallFunction(cls, "iiiiiiiO",
-                                        GET_YEAR(date),
-                                        GET_MONTH(date),
-                                        GET_DAY(date),
-                                        TIME_GET_HOUR(time),
-                                        TIME_GET_MINUTE(time),
-                                        TIME_GET_SECOND(time),
-                                        TIME_GET_MICROSECOND(time),
-                                        tzinfo);
-        DATE_SET_FOLD(result, TIME_GET_FOLD(time));
+                                       GET_YEAR(date),
+                                       GET_MONTH(date),
+                                       GET_DAY(date),
+                                       TIME_GET_HOUR(time),
+                                       TIME_GET_MINUTE(time),
+                                       TIME_GET_SECOND(time),
+                                       TIME_GET_MICROSECOND(time),
+                                       tzinfo);
+        if (result)
+            DATE_SET_FOLD(result, TIME_GET_FOLD(time));
     }
     return result;
 }