It was a Wednesday.
January 11, 2013 was on a Saturday. (November 1, 2003 was on a Saturday, if the date is day first, month second.)
1 January 1986 was a Wednesday.
1 January 1980 was a Tuesday.
1 January 1989 was a Sunday.
January 1 1974 was a Tuesday.
1 January 2006 was a Sunday.
1 January 1970 was a Thursday.
1 January 2014 will be a Wednesday.
1 January 2017 will be a Sunday.
1 January 2005 was a Saturday.
January 1 1979 was on a Monday.