Yevgeny: Over the past 50 years, it's got to be getting later and later and later. This really surprise me, that it's been this drastic. As of 20 20, it's 28 for women and 30 for men, which also varies by socionomic status. So even if that were the only change in society since the pre lily era and the lily era, we'd have to say, well, that's a huge change, almost a decade.
Also: why do so many people feel lost in their 20s?