> Has anyone tried epoch to UTC conversion in xslt  ?  The 
> algorithm is pretty detailed, need to take care of lot of conditions.
> 

It's trivial in XSLT 2.0, so I assume you are asking about XSLT 1.0?

I wouldn't attempt it - use extension functions.

Regards,

Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay