On May 8th & 9th...

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The holy and glorious Apostle and Evangelist John, also John the Theologian (May 8)

Saint Arsenius the Great, a philosopher from Rome in the African Desert (May 8)

Saints Great Martyrs Christopher & Nicholas the New & the trees that bleed every year on May 9!...

 

More here (in Greek) 

Από τον Αγαπημένο Μαθητή στον άγιο που μάτωσε τα δέντρα!