What's the difference between JavaScript's getYear() and getFullYear() functions?

It just makes no sense to me to get part of a year.

Back in the day, when memory was expensive and the Year 2000 was far in the future, it did make sense for people to represent 1975 as 75. In retrospect a short-sighted decision.

date.getFullYear() == date.getYear() + 1900

getYear() returns year minus 1900. This has been deprecated for a while now, it's best to use getFullYear().

Its a Y2K thing, basically getYear method returns the year minus 1900.

so, I encourage to move over to getFullYear & use that instead.