13 things you didn't know about Friday the 13th

It's Friday the 13th. If you're superstitious, you're likely under the impression that this is the most unlucky day on the calendar. Here are 13 facts about Friday the 13th to help keep your mind off all bad things that could happen today:

1. This is the second of three Friday the 13ths on the calendar in 2015: We’ll have a Friday the 13th in March, exactly four weeks after February’s Friday the 13th! Then we’ll have a Friday the 13th in November. That's exactly 39 weeks (3 x 13 weeks) after February’s Friday the 13th! 2012 was the last year with three Friday the 13ths. The next will be 2026.

2. The 1980 film "Friday the 13th" grossed nearly $40 million during its initial cinema run, according to information from the Internet Movie Database .

3. Fear of the number 13 is known as triskaidekaphobia, while fear of Friday the 13th is known as paraskavedekatriaphobia.

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