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.
                 01/07/2008: 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.
                 31/12/2004: Return to the boliviano
                 Bolivia ended the dollarization period and officially reintroduced the boliviano as the sole legal tender of the country.
                 01/10/2004: Banknote redesign
                 New banknotes of the Ukrainian Hryvnia were issued with enhanced security features and updated designs, aimed at combating counterfeiting.
                 31/12/2003: Dollarization crisis
                 Bolivia experienced a financial crisis, leading to the temporary dollarization of the economy and the use of the US dollar as legal tender.
                 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.
                 31/03/1988: Bolivianoization
                 Bolivianoization was implemented, requiring all contracts and transactions to be conducted in bolivianos instead of foreign currencies.
                 28/02/1987: Introduction of the second boliviano
                 A new boliviano, known as the second boliviano (Boliviano de Segunda), was introduced to replace the heavily devalued first boliviano.
                 31/01/1986: Hyperinflation crisis
                 Bolivia experienced a severe hyperinflation crisis, leading to the devaluation of the boliviano.
                 31/12/1962: Monetary reform
                 The boliviano underwent a monetary reform, with new banknotes and coins being issued.
                 31/12/1891: Introduction of Bolivian boliviano
                 The boliviano was introduced as the official currency of Bolivia, replacing the Bolivian peso.