Starting from “zero” point, the tenth year in not completed until the LAST DAY of the tenth year.
Just a peculiarity of the decimal system.
Sure, but the tenth year is 2019, not 2020.
Starting from “zero” point, the tenth year in not completed until the LAST DAY of the tenth year.
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This brings back memories of the remarks of my three year baby daughter after watching a video of herself as an infant: “When I was zero years old...”
Semantically correct, but hilarious!