Correct way to write a date

I think to avoid confusion the date should be spelled out:

The deadline is March 6, 2009. The exception would be a informal note between friends, or an inter-office memo, in which case March 6  would be fine. 

You will probably see the others as the 21st Century,  or The 2nd Book of Widget.

Thanks. I am not sure that there would be confusion between March 6 and March 6th. I'm just not sure if there's a correct way to write it in the example I gave. Still, this is helpful and thanks for responding!

I suppose writing March six is alright in an office environment if only for saving time.

I don't agree when it is actually spoken, for example: Today is March six........ouch!!!! That sounds disgusting. It sounds even worse when the year is said as: Two thousand nine, instead of the correct, two thousand AND nine.

no

Yes, it does. In Australia, it is correct to write as:-

6th March, 2010

or

March 6, 2010.

never, ever 6th of March 2010 !

Actually, for your example of 2009, the correct way to write or say it would be "Two thousand nine."

The "and" in "Two thousand and nine" would indicate a decimal point, which wouold change the meaning to 2000.9.

2000.9 would be "two thousand and nine tenths", not "two thousand and nine". The varying use of and is a difference in BrE and AmE but logic dictates that "two thousand and nine", said alone, would be 2009, not 2000.9.

No, the correct way is two thousand nine. As the previous person stated before two thousand AND nine would be written as 2000.09. Would you say 2010 is two thousand AND ten or two thousand ten? Two thousand ten would be the proper way to say it. The word "AND" indicates a decimal... even in money. If you change is $20.09, the cashier is supposed to say "You change is twenty dollars AND nine ce

That makes no sense because without the "tenths" or "hundredths" or "thousandths" there's no way to distinguish between what comes after the decimal.

If 2000.09 is "two thousand and nine" then what is 2000.9 or 2000.009 or 2000.0009?

The only reason it works for money is because "cent" is a word explicitly designating one one-hundredth of a dollar.

Hi, This is my first time here. And, I plan to return and join. In the meantime, in business school, the correct writing would be March 6.Hope this helps.