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The provincial flag of Saskatchewan is blazon Per fess Vert and Or, in the fly a prairie lily slipped and leaved proper, in the dexter chief an escutcheon of the Arms of Saskatchewan fimbriated Argent. The symbolism within the flag is shown just with the colours; yellow representing the grain fields in the southern portion of the province where as the green represents the northern forested areas. The Western red lily in the fly of the flag is the provincial flower. In 2017, The Minister of Parks, Culture and Sports designated September 22 as Saskatchewan Flag Day.

Source: Wikipedia