`struct.unpack('l', struct.pack('<hh', -1920, -1320))[0]` returns:
    -86443904
    Not a legal timestamp -- raised [Errno 22] Invalid argument
`struct.unpack('l', struct.pack('<hh', -1320, -1920))[0]` returns:
    -125764904
    Not a legal timestamp -- raised [Errno 22] Invalid argument
`struct.unpack('l', struct.pack('>hh', -1920, -1320))[0]` returns:
    -654671624
    Not a legal timestamp -- raised [Errno 22] Invalid argument
`struct.unpack('l', struct.pack('>hh', -1320, -1920))[0]` returns:
    -2131175174
    Not a legal timestamp -- raised [Errno 22] Invalid argument
`struct.unpack('L', struct.pack('<hh', -1920, -1320))[0]` returns:
    4208523392
    2103-05-13 14:16:32
`struct.unpack('L', struct.pack('<hh', -1320, -1920))[0]` returns:
    4169202392
    2102-02-12 10:46:32
`struct.unpack('L', struct.pack('>hh', -1920, -1320))[0]` returns:
    3640295672
    2085-05-09 21:14:32
`struct.unpack('L', struct.pack('>hh', -1320, -1920))[0]` returns:
    2163792122
    2038-07-26 17:22:02