The significance of the number 7 is fascinating.
For example - 46 years ago today, A 5.1 kg meteorite shattered into at
least 7 fragments and landed near the town of Archie, in the America's state of Missouri. 'Missouri' has 7 letters. And so does 'America'.
In Ancient Egypt there are 7 pathways to heaven and 7 heavenly cows. Osirius, God of the Afterlife, once led his father through the 7 halls of the Underworld.
There are 7 planetary metals - gold, silver, copper, iron, tin, mercury, and lead. 7 Stages of Alchemy - Calcination, Dissolution, Separation, Conjunction, Fermentation, Distillation, Coagulation.
7 named days of the week. And in the Muggle Christian bible, man was made in the 6th day and God rested on the 7th. Believe you me, people are quite complicated creatures aside from Thestrals and crumble-horned snorkacks.
And if you add today's date: 8 + 10 + 19 + 78 (look there's a 7 there) = 115. You add that: 1 + 1 + 5. What do you get? 7! Exactly.
...and my personal
favourite:
There are 7 colours - Red, Orange, Yellow, Green, Blue, Purple, Violet.