It's on a Friday. One easy way to find many days and dates, if done carefully, is to use the Calendar in Microsoft Windows. Just double-click the time display that shows in the lower-right corner of your screen. Change the month and year displays to whatever you need to look up. But be certain, when you have found your information, to click the Cancel button, or you will have changed the date on your computer to whatever was showing! (This calendar shows dates only between 1980 and 2099.)
4 July 1969 was a Friday.
4 July 1997 was a Friday.
4 July 1976 was a Sunday.
4 July 2009 will be a Saturday.
July 4 1971 was on a Sunday.
July 4, 1970 was a Saturday.
July 4 2000 was on a Tuesday.
July 4 2012 will be a Wednesday.
July 4 1996 was a Thursday.
July 4 1950 was a Tuesday.
July 4 2010 was a Sunday.
July 4 2007 was a Wednesday.