If you need a larger range and only care about "dates" only, there is a pretty simple formula valid for all dates after 4800 BC in [http://www.faqs.org/faqs/calendars/faq/part2](http://www.faqs.org/faqs/calendars/faq/part2)/ question 2.16.1
- Difference between two dates Peter58
- Re: Difference between two dates GULPF
- Re: Difference between two dates Peter58
- Re: Difference between two dates cblake
