Today is Friday 13th, in case you hadn't noticed. This video from Alltime Numbers provides some interesting facts about this fateful day, which is generally considered to be unlucky by superstitious people.
Note that you should say "Friday the thirteenth", even if you don't usually write the word "the". See SpeakEnglish! for more on how to say dates.
The Alltime Numbers YouTube channel has over 100 such videos, covering topics as varied as SpongeBob SquarePants In Numbers and What Are The Chances Of Seeing A UFO? Good material for practising numbers.