Re: "In the memo 'of' October 20"

"Harlan Messinger" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
>
> . . .
> Now that I look more closely, I can't think of when you'd have a date
after
> "at" or "in".
>

In North America interest rates are sometimes quoted "at" a certain
date, meaning "as of" that date.  Google shows an apparently mostly
British use of "as at" in the same sense.