Would a simple date/clock on each page hurt for seo

[Killah]

Since Yahoo doesnt display the date when the current pages were cached (Google does, others dont, others do) I was wondering if it would hurt somehow your rankings when you add a simple date / time to each page at the bottom which shows the time when the hit opened the page. That way you could always see which version of the page yahoo and others have cached.

I'm not sure but I could imagine that it hurts your rankings if each time a hit enters your page the html is slightly altered (numbers for the clock changed). I guess using only a date would be better in this case. I hope it's not, maybe somebody can bring some light into this.

[goodroi]

You could look this up on your log file and have a good guess when they grabbed your page. If you want to be more precise you would need to do it as an include so the spiders would crawl it, this would delay your pages being served up. A javascript probably wouldnt help since most crawlers ignore js.