Must Read : Words not to use in WordPress Post Form
Title sounds strange to you, but their are some words you should not use in wordpress form submit else you will get 404 error.
The words not to use is in the input name.
input name=”name” type=”text”
The above example will cause a problem as the name is predefined word in wordpress
And like name the other words are
Day and year.
Done use this words in name else you will have an error