Tuesday
You can use Microsoft Excel to work these problems out.
Put the date in one cell eg. A1 and the function "=WEEKDAY(A1)" in other.
The function will give the number of the weekday, where 1 is Sunday, 2 is Monday etc.
July 30, 1985 was a Tuesday.
30th July 1968 was a Tuesday.
July, 30th, 1965, was a Friday.
July 30th, 2010 was a Friday.
July 30th, 1981 fell on a Thursday.
July 30th, 2002 fell on a Tuesday.
July 30th 2005 fell on a Saturday.
Saturday.
It was a Monday.
Wednesday
Wednesday
It was a Wednesday.