An unofficial holiday celebrated among chemists in North America on October 23, between 6:02 AM and 6:02 PM, making the date 6:02 10/23. The time and date are derived from the Avogadro constant, which is approximately 6.02×1023, defining the number of particles (atoms or molecules) in a mole. The mole is one of the seven base SI units the other six are:
Alfred Nobel, born October 21, 1833, is famous for inventing dynamite and using the fortune made from dynamite to fund the Nobel Prizes. The erroneous publication in 1888 of a premature obituary of Nobel by a French newspaper, condemning him for his invention of dynamite, is said to have brought about his decision to leave a better legacy after his death. The obituary stated "Le marchand de la mort est mort ("The merchant of death is dead") and went on to say, "Dr. Alfred Nobel, who became rich by finding ways to kill more people faster than ever before, died yesterday.”
Henri Le Chatelier, born October 8, 1850. Le Chatelier is most famous for the law on chemical equilibrium which bears his name: If a chemical system at equilibrium experiences a change in concentration, temperature, or total pressure, the equilibrium will shift in order to minimize that change.