Does going to one's parents' house at 10:0 PM after Eid fulfill the oath "I will go to my parents' house after Eid," taking into consideration that the day ends at sunset?

If you swore to leave after the Eid day ends, the matter depends on your intention. If you had a specific intention regarding the time of departure, then adhering to it is the default. If you had no intention, then one refers to the reason for the oath and what prompted it. If that necessitates breaking the oath, then you must offer expiation. Otherwise, one refers to what the language dictates. If the Eid day ends at sunset, then you have not broken your oath.

And if intention, reason, and specific designation are absent, then the oath refers to what the name entails, which is the legal, real, and customary name. The Eid day, legally and linguistically, ends at sunset.