Tolys and Natalia engaged in a birthday surprise for Feliks on the day Poland regained independence. In spite of her dislike of Feliks, Belarus really respects him for these years of history (after all, Lithuania too).
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I'm sorry for this late headcanon.
I think that not everybody know that 11th November was the hundredth anniversary of Poland's independence. this country is my homeland but even if I lived in another country I would consider Poland to be amazing.
And remember, Feliks's birthday is 11th November, not 22th August, okay? ;D