When the time is folded, time_hash() uses DATE_xxx() macros, instead of TIME_xxx() macros, and so reads microseconds from the wrong bytes.

Bug introduced by the implementation of the PEP 495 (Local Time Disambiguation).

#define PyDateTime_DATE_GET_MICROSECOND(o)              \
    ((((PyDateTime_DateTime*)o)->data[7] << 16) |       \
     (((PyDateTime_DateTime*)o)->data[8] << 8)  |       \
      ((PyDateTime_DateTime*)o)->data[9])

#define PyDateTime_TIME_GET_MICROSECOND(o)              \
    ((((PyDateTime_Time*)o)->data[3] << 16) |           \
     (((PyDateTime_Time*)o)->data[4] << 8)  |           \
      ((PyDateTime_Time*)o)->data[5])

Attached patch fixes time_hash().

I guess that it's a dummy copy-paste issue.