>>24925471) Take todays date (10th)
2) Multiply by 3 (30). Remember this number.
3) Take the first digit of the result and multiply it by 5 (15).
4) Add 3 (18).
5) Double it (36).
6) Add the second digit of the result you got in step 2 (36).
7) Deduct 6 (30).
8) Multiply by 3 (90).
9) Add the individual digits together, and the result is... 9!
This works for every day of the month, meaning that every day is Cirno day!