See also
www.factbase.info/he/hex-digit.html for "sexidecimal"/"hexadecimal"
>"Hexagessimal" sounds like one of those religious days, like so any days after Easter or something. Actually Hexadecimal is one of those "naughty" portmanteau words with Greek and Latin roots mixed in - hex = greek for 6 (as opposed to Latin Sextus), and Decimal from Latin (Deces?)