Next year will
Assuming a typical four-year program, you will graduate college in the spring of 2025 if you start in fall 2021.
2017 in middle school and 2021
2017 in middle school and 2021
2016 is a leap year but 2010 and 2021 are not.
2016 is a leap year but 2010 and 2021 are not.
We start school August 31, 2009
Start of the school year
In the US, at least, "the class of " is universally understood to mean "the class that graduated/will graduate in the spring of ". People that graduate at a different time than the rest of the class are normally considered to keep the same class year, as long as they're not graduating a full school year before or after the rest of their class. So if throughout your school years you've been in the "class of 1980" based on starting Kindergarten in fall 1967, but you actually complete your graduation requirements in November 1979, you're still "class of 1980" rather than "class of 1979". However, if you skipped a grade back in elementary school ... or were held back a year ... your class year would shift accordingly.To address your specific questions, the Class of 2021 will graduate high school in spring 2021, and if you graduate in school year 2016-2017 you will be Class of 2017.
The Japanese school year begins in April.
The current year is 2021.
The Child Tax Credit for 2021 started on July 15th, 2021.
There are no Olympic Games in 2021. They only happen every 4 years and 2021 is not an Olympic year.