[cafard]

Then there's good old IE 11:

foo = new Date(2018, 6, 100); [date] Mon Oct 08 2018 00:00:00 GMT-0400 (Eastern Daylight Time)

[gmiller123456]

What is it about this that you find odd? I just tested it in Chrome and it provides the same answer. I'm pretty sure this is the documented behavior.