A timeline of key tariff-related events

February 1st: Steep new United States tariffs on Canada, Mexico and China announced. February 3rd: Mexico, Canada tariffs placed on hold for 30 days. February 4th: Tariffs on China take effect, Beijing reveals retaliatory package. February 10th: US sets 25 per cent tariffs on aluminium and steel imports - expected to take effect March 12th. March 4th: Delayed 25 per cent US tariffs on Mexico and Canada take effect, US announces additional 10 per cent levy on Chinese imports. Canada announces retaliatory package: 25 per cent tariffs on $155 billion (€133 billion) worth of imported goods, including an immediate list…