On 6 April ( 25 March according to the Julian calendar then in use in Greece ) , the games of the First Olympiad were officially opened ; it was Easter Monday for both the Western and Eastern Christian Churches and the anniversary of Greece 's independence .
On April 6 ( March 25 according to the Julian calendar then in use in Greece ) , the games of the First Olympiad were officially opened ; it was Easter Monday for both the Western and Eastern Christian Churches and the anniversary of Greece 's independence .