Certainly worth reading in its entirety, but here is the concluding paragraph:
The institution of the Crown has evolved, but our dedication to a holiday near the end of May has remained stalwart. It marks the definition between winter and summer and is duly commemorated in private and public ways across much of the land. Nobody with any sense would ever plant annuals, open cottages, go camping or swim in a lake before the 24th of May. The Queen's birthday – it is Queen Elizabeth II's official Canadian birthday – is the occasion for a celebration, but we are also honouring our own traditions and our own past. The origins of the holiday may be Imperial, but the practice is decidedly Canadian.