You are not understanding that the years you are looking at are part of the fund's name. And you are not understanding that Vanguard's page for VTTVX is showing a summary table of all of its target retirement funds, not just VTTVX, and that
is confusing.
You are misreading a table as if it referred to the asset allocation VTTVX had and will have at various dates. It isn't a table of what VTTVX will do. It is a table showing
every Target Retirement fund and what that fund's allocations are
now. Only the highlighted column is about Target Retirement 2025, the others are about other funds. And it's about 2024 and only 2024, not any other year.
Clue #1 is that it says "as of 10/31/2024." It's about twelve different funds today. It's not about one fund at twelve different times.
Clue #2 is that the last column is headed "Income" instead of a year. That could be a clue that we're looking at fund names, because there's no year named "Income" and there is a fund named "Vanguard Target Retirement Income."
Higher up on the page is the chart showing what VTTVX will do over the years, but it happens to be graduated in terms of "years before or after target date." So for VTTVX you'd add 2025 to all the X-axis numbers.
By doing it that way they can use the same charts for every Target Retirement Fund.
Annual income twenty pounds, annual expenditure nineteen nineteen and six, result happiness; Annual income twenty pounds, annual expenditure twenty pounds ought and six, result misery.