I found this fix to prevent phone numbers from hyperlinking on iPhone...
<meta name="format-detection" content="telephone=no" />
Does anyone know of anything similar to prevent dates from hyperlinking?
I don't know of ways to prevent the linking entirely, but there are ways to hide it so they look like normal text. Our friends over at Litmus have an article on it.
If you find a similar meta tag to prevent dates from linking entirely, though, please let us know!
We've not been able to find any way to turn it off, but there are ways to trick it as Diana mentioned. See http://stackoverflow.com/questions/5265443/mobile-safari-iphone-mail-app-html-design-issues-prevent-autolinking-and-styli for more discussion.