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diff --git a/include/python2.7/datetime.h b/include/python2.7/datetime.h
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+/* datetime.h
+ */
+
+#ifndef DATETIME_H
+#define DATETIME_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Fields are packed into successive bytes, each viewed as unsigned and
+ * big-endian, unless otherwise noted:
+ *
+ * byte offset
+ * 0 year 2 bytes, 1-9999
+ * 2 month 1 byte, 1-12
+ * 3 day 1 byte, 1-31
+ * 4 hour 1 byte, 0-23
+ * 5 minute 1 byte, 0-59
+ * 6 second 1 byte, 0-59
+ * 7 usecond 3 bytes, 0-999999
+ * 10
+ */
+
+/* # of bytes for year, month, and day. */
+#define _PyDateTime_DATE_DATASIZE 4
+
+/* # of bytes for hour, minute, second, and usecond. */
+#define _PyDateTime_TIME_DATASIZE 6
+
+/* # of bytes for year, month, day, hour, minute, second, and usecond. */
+#define _PyDateTime_DATETIME_DATASIZE 10
+
+
+typedef struct
+{
+ PyObject_HEAD
+ long hashcode; /* -1 when unknown */
+ int days; /* -MAX_DELTA_DAYS <= days <= MAX_DELTA_DAYS */
+ int seconds; /* 0 <= seconds < 24*3600 is invariant */
+ int microseconds; /* 0 <= microseconds < 1000000 is invariant */
+} PyDateTime_Delta;
+
+typedef struct
+{
+ PyObject_HEAD /* a pure abstract base clase */
+} PyDateTime_TZInfo;
+
+
+/* The datetime and time types have hashcodes, and an optional tzinfo member,
+ * present if and only if hastzinfo is true.
+ */
+#define _PyTZINFO_HEAD \
+ PyObject_HEAD \
+ long hashcode; \
+ char hastzinfo; /* boolean flag */
+
+/* No _PyDateTime_BaseTZInfo is allocated; it's just to have something
+ * convenient to cast to, when getting at the hastzinfo member of objects
+ * starting with _PyTZINFO_HEAD.
+ */
+typedef struct
+{
+ _PyTZINFO_HEAD
+} _PyDateTime_BaseTZInfo;
+
+/* All time objects are of PyDateTime_TimeType, but that can be allocated
+ * in two ways, with or without a tzinfo member. Without is the same as
+ * tzinfo == None, but consumes less memory. _PyDateTime_BaseTime is an
+ * internal struct used to allocate the right amount of space for the
+ * "without" case.
+ */
+#define _PyDateTime_TIMEHEAD \
+ _PyTZINFO_HEAD \
+ unsigned char data[_PyDateTime_TIME_DATASIZE];
+
+typedef struct
+{
+ _PyDateTime_TIMEHEAD
+} _PyDateTime_BaseTime; /* hastzinfo false */
+
+typedef struct
+{
+ _PyDateTime_TIMEHEAD
+ PyObject *tzinfo;
+} PyDateTime_Time; /* hastzinfo true */
+
+
+/* All datetime objects are of PyDateTime_DateTimeType, but that can be
+ * allocated in two ways too, just like for time objects above. In addition,
+ * the plain date type is a base class for datetime, so it must also have
+ * a hastzinfo member (although it's unused there).
+ */
+typedef struct
+{
+ _PyTZINFO_HEAD
+ unsigned char data[_PyDateTime_DATE_DATASIZE];
+} PyDateTime_Date;
+
+#define _PyDateTime_DATETIMEHEAD \
+ _PyTZINFO_HEAD \
+ unsigned char data[_PyDateTime_DATETIME_DATASIZE];
+
+typedef struct
+{
+ _PyDateTime_DATETIMEHEAD
+} _PyDateTime_BaseDateTime; /* hastzinfo false */
+
+typedef struct
+{
+ _PyDateTime_DATETIMEHEAD
+ PyObject *tzinfo;
+} PyDateTime_DateTime; /* hastzinfo true */
+
+
+/* Apply for date and datetime instances. */
+#define PyDateTime_GET_YEAR(o) ((((PyDateTime_Date*)o)->data[0] << 8) | \
+ ((PyDateTime_Date*)o)->data[1])
+#define PyDateTime_GET_MONTH(o) (((PyDateTime_Date*)o)->data[2])
+#define PyDateTime_GET_DAY(o) (((PyDateTime_Date*)o)->data[3])
+
+#define PyDateTime_DATE_GET_HOUR(o) (((PyDateTime_DateTime*)o)->data[4])
+#define PyDateTime_DATE_GET_MINUTE(o) (((PyDateTime_DateTime*)o)->data[5])
+#define PyDateTime_DATE_GET_SECOND(o) (((PyDateTime_DateTime*)o)->data[6])
+#define PyDateTime_DATE_GET_MICROSECOND(o) \
+ ((((PyDateTime_DateTime*)o)->data[7] << 16) | \
+ (((PyDateTime_DateTime*)o)->data[8] << 8) | \
+ ((PyDateTime_DateTime*)o)->data[9])
+
+/* Apply for time instances. */
+#define PyDateTime_TIME_GET_HOUR(o) (((PyDateTime_Time*)o)->data[0])
+#define PyDateTime_TIME_GET_MINUTE(o) (((PyDateTime_Time*)o)->data[1])
+#define PyDateTime_TIME_GET_SECOND(o) (((PyDateTime_Time*)o)->data[2])
+#define PyDateTime_TIME_GET_MICROSECOND(o) \
+ ((((PyDateTime_Time*)o)->data[3] << 16) | \
+ (((PyDateTime_Time*)o)->data[4] << 8) | \
+ ((PyDateTime_Time*)o)->data[5])
+
+
+/* Define structure for C API. */
+typedef struct {
+ /* type objects */
+ PyTypeObject *DateType;
+ PyTypeObject *DateTimeType;
+ PyTypeObject *TimeType;
+ PyTypeObject *DeltaType;
+ PyTypeObject *TZInfoType;
+
+ /* constructors */
+ PyObject *(*Date_FromDate)(int, int, int, PyTypeObject*);
+ PyObject *(*DateTime_FromDateAndTime)(int, int, int, int, int, int, int,
+ PyObject*, PyTypeObject*);
+ PyObject *(*Time_FromTime)(int, int, int, int, PyObject*, PyTypeObject*);
+ PyObject *(*Delta_FromDelta)(int, int, int, int, PyTypeObject*);
+
+ /* constructors for the DB API */
+ PyObject *(*DateTime_FromTimestamp)(PyObject*, PyObject*, PyObject*);
+ PyObject *(*Date_FromTimestamp)(PyObject*, PyObject*);
+
+} PyDateTime_CAPI;
+
+#define PyDateTime_CAPSULE_NAME "datetime.datetime_CAPI"
+
+
+/* "magic" constant used to partially protect against developer mistakes. */
+#define DATETIME_API_MAGIC 0x414548d5
+
+#ifdef Py_BUILD_CORE
+
+/* Macros for type checking when building the Python core. */
+#define PyDate_Check(op) PyObject_TypeCheck(op, &PyDateTime_DateType)
+#define PyDate_CheckExact(op) (Py_TYPE(op) == &PyDateTime_DateType)
+
+#define PyDateTime_Check(op) PyObject_TypeCheck(op, &PyDateTime_DateTimeType)
+#define PyDateTime_CheckExact(op) (Py_TYPE(op) == &PyDateTime_DateTimeType)
+
+#define PyTime_Check(op) PyObject_TypeCheck(op, &PyDateTime_TimeType)
+#define PyTime_CheckExact(op) (Py_TYPE(op) == &PyDateTime_TimeType)
+
+#define PyDelta_Check(op) PyObject_TypeCheck(op, &PyDateTime_DeltaType)
+#define PyDelta_CheckExact(op) (Py_TYPE(op) == &PyDateTime_DeltaType)
+
+#define PyTZInfo_Check(op) PyObject_TypeCheck(op, &PyDateTime_TZInfoType)
+#define PyTZInfo_CheckExact(op) (Py_TYPE(op) == &PyDateTime_TZInfoType)
+
+#else
+
+/* Define global variable for the C API and a macro for setting it. */
+static PyDateTime_CAPI *PyDateTimeAPI = NULL;
+
+#define PyDateTime_IMPORT \
+ PyDateTimeAPI = (PyDateTime_CAPI *)PyCapsule_Import(PyDateTime_CAPSULE_NAME, 0)
+
+/* Macros for type checking when not building the Python core. */
+#define PyDate_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DateType)
+#define PyDate_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->DateType)
+
+#define PyDateTime_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DateTimeType)
+#define PyDateTime_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->DateTimeType)
+
+#define PyTime_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->TimeType)
+#define PyTime_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->TimeType)
+
+#define PyDelta_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->DeltaType)
+#define PyDelta_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->DeltaType)
+
+#define PyTZInfo_Check(op) PyObject_TypeCheck(op, PyDateTimeAPI->TZInfoType)
+#define PyTZInfo_CheckExact(op) (Py_TYPE(op) == PyDateTimeAPI->TZInfoType)
+
+/* Macros for accessing constructors in a simplified fashion. */
+#define PyDate_FromDate(year, month, day) \
+ PyDateTimeAPI->Date_FromDate(year, month, day, PyDateTimeAPI->DateType)
+
+#define PyDateTime_FromDateAndTime(year, month, day, hour, min, sec, usec) \
+ PyDateTimeAPI->DateTime_FromDateAndTime(year, month, day, hour, \
+ min, sec, usec, Py_None, PyDateTimeAPI->DateTimeType)
+
+#define PyTime_FromTime(hour, minute, second, usecond) \
+ PyDateTimeAPI->Time_FromTime(hour, minute, second, usecond, \
+ Py_None, PyDateTimeAPI->TimeType)
+
+#define PyDelta_FromDSU(days, seconds, useconds) \
+ PyDateTimeAPI->Delta_FromDelta(days, seconds, useconds, 1, \
+ PyDateTimeAPI->DeltaType)
+
+/* Macros supporting the DB API. */
+#define PyDateTime_FromTimestamp(args) \
+ PyDateTimeAPI->DateTime_FromTimestamp( \
+ (PyObject*) (PyDateTimeAPI->DateTimeType), args, NULL)
+
+#define PyDate_FromTimestamp(args) \
+ PyDateTimeAPI->Date_FromTimestamp( \
+ (PyObject*) (PyDateTimeAPI->DateType), args)
+
+#endif /* Py_BUILD_CORE */
+
+#ifdef __cplusplus
+}
+#endif
+#endif
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