I have almost four years following Type Moon and to this day, i have no idea what th title references. "Tsukihime" is literally moon princes, thus Arc , but why "Fate" ?
The ida of "Fate" is not very present for any of the characters, since there is multiple timelines , i just can think in britan bein fated to fall, but thats just relevant to arturias rute and not enought to name a whole piece . Or is actually about "defying Fate" ?
And the "Stay / Night " part? I can think in the "fateful night" when shiro whitnessed Archer and Lancer fight, wich seems to be a constant