For me, here in the American midwest, it’s July 21 at 8pm. This means it’s already tomorrow everywhere from Greenwich UK to Japan. In fact, the big solar eclipse of 2009 has already begun!
The animated image you see here is a great representation of where the moon’s shadow is (and was, and will be) during this eclipse.
For more specifics, check out the original web page at http://www.eclipse.org.uk/eclipse/0412009/.