There is no doubt that October, 13 2021 is International Skeptics Day ... or is there? No, seriously this is an unofficial day to query each and everything like a real skeptic would do. Being skeptic does not exactly mean to not believing anything but to always keep in mind that things could also be different than the way they seem. Scrutinizing things instead of always accepting them can lead to brand-new insights.
International Skeptics Day celebrates true facts and the exposal of wrong ones by being skeptic and asking the right questions. If nobody had ever been skeptic about established facts then people would still believe the earth is flat. The origin of International Skeptics Day is not clear but everyone can take part in it by querying things and search for evidence before you believe.