Sept. 13 falls on a Sunday -- not a Friday -- this year, but the date will still be marked as Defy Superstition Day, according to Holiday Insights. The precise origin of this special event are as mystical as many superstitions themselves, but Defy Superstition Day dates back to at least 1999.

And what better way to have fun with some of your crazier beliefs than to invest in a brand new case for your iPhone 6? After all, if a black cat crosses your path and you happen to drop your smartphone as a result, the crucial device will at least be well-protected.

So here are some of our favorite superstition-inspired options:

  • Triskaidekaphobia, or the fear of the number 13, is one of the most common superstitions in the United States. Historically, it appears to be related to Judas -- the 13th person at the Last Supper -- who betrayed Jesus and ultimately hanged himself.

    Triskaidekaphobia, of course, is also linked to paraskevidekatriaphobia, the fear of Friday the 13th: And on that day, you ought to "keep calm and don't go swimming, don't have sex, don't smoke, don't drink and don't go out," Customycase's Keep Calm Friday 13th cover recommends. The elegant and protective case is available in rubber and hard-plastic versions and will set you back a mere $12.99.

  • Even though you may not suffer from ailurophobia -- the persistent, irrational fear of cats -- the sight of a black kitty crossing your path may still cause you to worry a bit.

    If you think this kind of bad reputation is entirely underserved, however, then take a look at Delele's 3D Cat Shaped Fluffy Plush Fur case, which is offered for a mere $6.59 on Amazon. The cover will protect your device from grime, dust, scratches and scrapes -- and is also available in pink, purple and white if you just can't get over your superstition.

  • Enough with black cats, ladders and dark numbers already? Need a bit of good luck for the road?

    Then consider Zazzle's Lucky Carved Maple case, which features a four-leaf clover and is handcrafted in Elkhart, Indiana. This cover, constructed with durable plastic encasing and a wood inlay with two coats of durable protective finish, will cost you $50.95.