<Dl> <Dt> 1968 </Dt> <Dd> January </Dd> <Dd> February </Dd> <Dd> March </Dd> <Dd> April </Dd> <Dd> May </Dd> <Dd> June </Dd> <Dd> July </Dd> <Dd> August </Dd> <Dd> September </Dd> <Dd> October </Dd> <Dd> November </Dd> <Dd> December </Dd> </Dl> <Table> <Tr> <Td> <<</Td> <Th_colspan="5"> April 1968 </Th> <Td>>> </Td> </Tr> <Tr> <Th> Su </Th> <Th> Mo </Th> <Th> Tu </Th> <Th> We </Th> <Th> Th </Th> <Th> Fr </Th> <Th> Sa </Th> </Tr> <Tr> <Td> </Td> <Td> 01 </Td> <Td> 02 </Td> <Td> 03 </Td> <Td> 04 </Td> <Td> 05 </Td> <Td> 06 </Td> </Tr> <Tr> <Td> 07 </Td> <Td> 08 </Td> <Td> 09 </Td> <Td> 10 </Td> <Td> 11 </Td> <Td> 12 </Td> <Td> 13 </Td> </Tr> <Tr> <Td> 14 </Td> <Td> 15 </Td> <Td> 16 </Td> <Td> 17 </Td> <Td> 18 </Td> <Td> 19 </Td> <Td> 20 </Td> </Tr> <Tr> <Td> 21 </Td> <Td> 22 </Td> <Td> 23 </Td> <Td> 24 </Td> <Td> 25 </Td> <Td> 26 </Td> <Td> 27 </Td> </Tr> <Tr> <Td> 28 </Td> <Td> 29 </Td> <Td> 30 </Td> <Td> </Td> <Td_colspan="3"> </Td> </Tr> </Table> <Tr> <Td> <<</Td> <Th_colspan="5"> April 1968 </Th> <Td>>> </Td> </Tr>

What day of the week was april 6 1968