This year Air Canada celebrate their 70th  anniversary. The Canadian flag carrier commenced operations in 1937 as Trans-Canada Airlines (TCA), and are commemorating the occasion using TCA 70th anniversary tail markings.

Air Canada A321 with TCA livery 
The first Air Canada A321, registration C-GIUB, painted with the TCA 70th anniversary retro livery at Pearson International Airport.


 

Source: FlightGlobal.com