Should Saturday night prove to have clear skies, a total lunar eclipse will be visible to Greece, along with the rest of Europe, Africa, and Western Asia.
The eclipsian (ok, that's not a word) time table from NASA is as follows (UT is the same as GMT):
Penumbral Eclipse Begins: 20:18:11 UT
Partial Eclipse Begins: 21:30:22 UT
Total Eclipse Begins: 22:44:13 UT
Greatest Eclipse: 23:20:56 UT
Total Eclipse Ends: 23:57:37 UT
Partial Eclipse Ends: 01:11:28 UT
Penumbral Eclipse Ends: 02:23:44 UT
We can expect some cool color changes on the shadowed moon, but don't be too superstitious, because lunar eclipses happen up to three times a year.