Happy Birthday!

Triskaidekaphobia

Nice word and a long one. 13 persons for the Last Supper? When placed in Greece that would be expectable. The Greek, traditionally, always put an extra place and plate for the unexpected guest.

Triskaidekaphobia, there is one word outrunning it's lenght that I know of:
Precipitevolissimevolmente, - Italian, meaning rushing off at super high speed. Head over heels.

Which is what you should do if you fear the number 13.

It is the 13th today! Wow! Run!