Ever wanted to know well in advance, when Friday 13th falls?
Use this calendar
That way you can minimize any appointments to the dentist, move expected surgery, and avoid Bunning's Warehouse on these days. Use a calm sink of water to see yourself today, instead of mirrors.
Today, you also might like to avoid Catteries, Olsen Twins movies (born Fri 13) or music by Tupac Shakur (died Fri 13), skip the salt on your fish n chips, use powdered milk today to prevent spills, and if you're planning on pre-ordering the next Harry Potter book (which is due out on Friday July 13), maybe pick it up on the Saturday.
Best of luck to you all :)