2021

2021 was the second year of the 2020s and the twenty-first year of the 21st century.

In 1984, Superman was exposed to Red Kryptonite which physically de-aged him into what appeared to be a seven year old boy. The Kryptonite wore off within a day or two but if it hadn't, presumably Superman would have had to grow up all over again.

With that thought in mind, it wouldn't have been until this year, 2021, that he returned to the age that he was in 1984, which was around 44 years old.

Previous Year
2020

Next Year
2022