Going from the beginning of the 20th century to 2014, the 1st of October has been on a Wednesday in the following years:
1902
1913
1919
1924
1930
1941
1947
1952
1958
1969
1975
1980
1986
1997
2003
2008
2014
October 1, 2014 will fall on a Wednesday this year.
2008
October 1 1986 was on a Wednesday.
October 4, 1944, was a Wednesday.
October 1, 2008 fell on a Wednesday.
October 1, 1958 fell on a Wednesday.
October 1st 2003 was a Wednesday.
Wednesday
The exact answer depends on October of which year but you have not specified that. Over the years, the probability averages out at 1/7.
The last time it happened was in 2002.
October 1st, 2014 will fall on a Wednesday.
It was a Wednesday.