Well these would be designated dates where prices will be volatile, which coins will be loaded or sold.
March key dates
3/3: Manufacturing PMI of Spain, Germany, Eurozone and the US/ Eurozone CPI
4/3: Unemployment and affiliation to the Spanish Social Security
5/3: PMI services of Spain, Germany, Eurozone, USA, China and Japan/ PPI of the Eurozone
6/3: ECB rate decision/Eurozone retail sales
7/3: Spanish industrial production/ Eurozone GDP/ Non-agricultural payrolls and US unemployment rate
9/3: China CPI and PPI
3/12: Spanish retail sales/ US CPI/ Inditex results
3/14: CPI of Spain / GDP of the United Kingdom
3/19: Fed/Eurozone CPI rate decision
3/20: Interest rates in China / Bank of England rate decision / Japan stock exchange closed for holiday
3/26: GDP of Spain/ CPI and PPI of the United Kingdom
3/27: Spanish retail sales/US GDP
3/28: Advance CPI of Spain/ PCE (personal consumption expenditure) of the US
3/31: Spain's current account/Germany's advance CPI