On the Τα ημερολόγια μου page, select a calendar you wish disable alarms for.
Click Επεξεργασία.
Step 2
Click the tab Ειδοποιήσεις and set both alarm settings to Κανένα.
Click Αποθήκευση.
The new settings take effect the next time your application downloads the calendar data, usually within a couple days. You may also do it manually to receive the update right away.