02/03/2020: COVID-19 impact
                 The outbreak of the COVID-19 pandemic resulted in economic disruptions, affecting the Ukrainian Hryvnia and causing volatility in the currency markets.
                 05/02/2015: Currency devaluation
                 Due to the economic crisis, the Ukrainian Hryvnia experienced a significant devaluation, leading to a sharp increase in prices and financial hardships.
                 20/02/2014: Ukrainian revolution
                 The Ukrainian revolution began, leading to political instability and economic challenges, impacting the value and stability of the Ukrainian Hryvnia.
                 01/07/2013: Exchange rate unification
                 North Korea unifies the official exchange rate and market rate, resulting in a significant depreciation of the won.
                 30/11/2009: Currency revaluation
                 North Korean government announces a currency revaluation, replacing the old won notes at a ratio of 1 for 100.
                 01/07/2008: Exchange rate flexibility
                 Ukraine implemented a flexible exchange rate system, allowing the Ukrainian Hryvnia to fluctuate based on market forces rather than being pegged to a fixed rate.
                 01/10/2004: Banknote redesign
                 New banknotes of the Ukrainian Hryvnia were issued with enhanced security features and updated designs, aimed at combating counterfeiting.
                 01/12/2001: Currency redenomination
                 North Korean won is redenominated, with the previous notes and coins being replaced by new ones at a ratio of 1 for 1,000.
                 02/09/1996: Currency reform
                 A currency reform was conducted, introducing new banknotes and coins of the Ukrainian Hryvnia, addressing issues of inflation and stabilization.
                 02/09/1992: Introduction of the Ukrainian Hryvnia
                 The Ukrainian Hryvnia (UAH) was introduced as the national currency, replacing the Soviet ruble, marking Ukraine's economic independence.
                 25/02/1992: Introducing foreign exchange certificates
                 North Korea introduces foreign exchange certificates to counter hyperinflation and stabilize its economy.
                 06/12/1979: Second major revaluation
                 North Korean won undergoes its second major revaluation, with the exchange rate being set at 1 for 10.
                 31/12/1959: First major revaluation
                 North Korean won undergoes its first major revaluation, with the exchange rate being set at 1 for 100.
                 06/12/1947: Introduction of North Korean won
                 North Korean won is introduced as the official currency of North Korea, replacing the Korean yen at par value.