Ta, that's sooooooo much help :-)
Hey, we each do what we can... :-)
Ok, in a spirit of helpfullness (it must be the heat!), the following may be of interest: http://scienceworld.wolfram.com/astronomy/MetonicCycle.html http://www.mythicalireland.com/astronomy/moonmovements/metoniccycle.html http://www.12x30.net/metonic.html
Google brings up over 200 hits!