Jan 23rd was a Wednesday in 2008, 2002, 1991, 1985 and 1980 for the past few years.
The most recent two years before 2020 in which 11 Mar was a Wednesday are 2009 and 2015.
1989, 1995, 2000 and 2006
Taking from the start of the 20th century to now, the 1st of January has been on a Wednesday in 1902, 1908, 1913, 1919, 1930, 1936, 1941, 1947, 1958, 1964, 1969, 1975, 1986, 1992, 1997, 2003 and 2014. It will next be on a Wednesday in 2020.
August 13th was a Wednesday in 2008, 2003, 1997, 1986, 1980, 1975, 1969, 1958, 1952, 1947, 1941, 1930, 1924, 1919, 1913, 1902, 1890, etc.
Taking from the start of the 20th century, the 20th of June has been on a Wednesday in 1906, 1917, 1923, 1928, 1934, 1945, 1951, 1956, 1962, 1973, 1979, 1984, 1990, 2001, 2007 and 2012. The next time will be in 2018.
In the last 100 years, the 4th of July has been on a Wednesday in:191719231928193419451951195619621973197919841990200120072012In the last 100 years, the 4th of July has been on a Wednesday in:191719231928193419451951195619621973197919841990200120072012In the last 100 years, the 4th of July has been on a Wednesday in:191719231928193419451951195619621973197919841990200120072012In the last 100 years, the 4th of July has been on a Wednesday in:191719231928193419451951195619621973197919841990200120072012In the last 100 years, the 4th of July has been on a Wednesday in:191719231928193419451951195619621973197919841990200120072012In the last 100 years, the 4th of July has been on a Wednesday in:191719231928193419451951195619621973197919841990200120072012In the last 100 years, the 4th of July has been on a Wednesday in:191719231928193419451951195619621973197919841990200120072012In the last 100 years, the 4th of July has been on a Wednesday in:191719231928193419451951195619621973197919841990200120072012In the last 100 years, the 4th of July has been on a Wednesday in:191719231928193419451951195619621973197919841990200120072012In the last 100 years, the 4th of July has been on a Wednesday in:191719231928193419451951195619621973197919841990200120072012In the last 100 years, the 4th of July has been on a Wednesday in:191719231928193419451951195619621973197919841990200120072012
Taking just the 20th and 21st centuries, these are the years when the 6th of February is on a Wednesday:19011907191819241929193519461952195719631974198019851991200220082013201920302036204120472058206420692075208620922097Taking just the 20th and 21st centuries, these are the years when the 6th of February is on a Wednesday:19011907191819241929193519461952195719631974198019851991200220082013201920302036204120472058206420692075208620922097Taking just the 20th and 21st centuries, these are the years when the 6th of February is on a Wednesday:19011907191819241929193519461952195719631974198019851991200220082013201920302036204120472058206420692075208620922097Taking just the 20th and 21st centuries, these are the years when the 6th of February is on a Wednesday:19011907191819241929193519461952195719631974198019851991200220082013201920302036204120472058206420692075208620922097Taking just the 20th and 21st centuries, these are the years when the 6th of February is on a Wednesday:19011907191819241929193519461952195719631974198019851991200220082013201920302036204120472058206420692075208620922097Taking just the 20th and 21st centuries, these are the years when the 6th of February is on a Wednesday:19011907191819241929193519461952195719631974198019851991200220082013201920302036204120472058206420692075208620922097Taking just the 20th and 21st centuries, these are the years when the 6th of February is on a Wednesday:19011907191819241929193519461952195719631974198019851991200220082013201920302036204120472058206420692075208620922097Taking just the 20th and 21st centuries, these are the years when the 6th of February is on a Wednesday:19011907191819241929193519461952195719631974198019851991200220082013201920302036204120472058206420692075208620922097Taking just the 20th and 21st centuries, these are the years when the 6th of February is on a Wednesday:19011907191819241929193519461952195719631974198019851991200220082013201920302036204120472058206420692075208620922097Taking just the 20th and 21st centuries, these are the years when the 6th of February is on a Wednesday:19011907191819241929193519461952195719631974198019851991200220082013201920302036204120472058206420692075208620922097Taking just the 20th and 21st centuries, these are the years when the 6th of February is on a Wednesday:19011907191819241929193519461952195719631974198019851991200220082013201920302036204120472058206420692075208620922097
Every 28 years
November 1, will next fall on a Wednesday in 2017. November 1 has previously fallen on a Wednesday in 2006, 2000 and 1995.
2006
The following years had a Wednesday 6th February:- 1952 1957 1963 1974 1985 1991 2002 2008
"Wednesday 13" (Joseph Poole) is 40 years old (birthdate: August 12, 1976).
You could go back for thousands of years for a question like that, but taking just the last 50 years, St. Valentine's Day, the 14th of February, has been on a Wednesday in 1968, 1973, 1979, 1990, 1996, 2001 and 2007. It will next be on a Wednesday in 2018.
Wednesday
24 years
The most recent two years before 2020 in which 11 Mar was a Wednesday are 2009 and 2015.
Leap years fall on a Wednesday every 28 years. So, every seventh leap year will be a Wednesday. The odds are one in 7. The sequence is: Sunday, Thursday, Monday, Friday, Tuesday, Saturday, Wednesday, S, TH, M, F, T, St, W, etc...