Transcription
astriiformes:
The Fellowship gets on the topic of their ages one night and Boromir comes to the dawning realization that he has absolutely no idea how old any of his companions are supposed to be at all
astriiformes:
Boromir, pointing at the hobbits: I don't know how your agese work
Boromir, pointing at Legolas and Gimbl: I definitely don't know how either of your ages work
Boromir, pointing at Aragorn: I thought I knew how your age worked but apparently I was wrong
Boromir, pointing at Gandalf: I especially don't know how your age works
Gandalf: It doesn't, but carry on
I thought gandalf was 2019 years old. But that would make him younger than legolas then.
I believe that would only encompass his time in Middle Earth, but someone more knowledgeable would likely be able to clarify if/why that's different.
He existed before the world itself, and is literally older than time. His entire race basically came to be at the dawn of creation. They have simply always existed.