Re: how about...will be held orto be to be held?
Both are acceptable. Like riquecohen, I would remove "the" in the date.
Originally Posted by scrooge1974
The conference will be held on March 3rd 2013.
The conference is to be held on March 3rd 2013.
The conference will take place on March 3rd 2013.
The conference is to take place on March 3rd 2013.
You could also use "3rd March 2013", "3-3-2013" or "3/3/2013 (luckily, 3rd March means that it doesn't matter whether you're using the British or American number order for dates. Had it been 4th March, it would be 4-3-2013 or 4/3/2013 in BrE, but 3-4-2013 or 3/4/2013 in AmE).
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.