tl;dr: when answering a negative question, can いいえ be used to affirm what the question states as a whole? I came to Japan at the age of six, and I guess I pass as a normal native speaker of Japanese ...
Why is it that some temporal nouns cannot be marked with に? And why do they become more acceptable with には?
Consider the following: に here is used in its function of denoting the time where an event occurs (に1): ◯ 一時に1 ◯ 一時半に1 ◯ 月曜日に1 ◯ 正月に1 * 昨日に1 ?/◯ 昨日には * 今日に1 ?/◯ 今日には * 明日に1 ?/◯ 明日には * 去年に1 ?/◯ 去年には ...