At what age is someone a ‘mature student’?

Basically the title :) I’m wondering what age you consider an older student in undergrad.

I’m a student in Canada and I usually think of ‘older students’ as being 30+ or maybe 25 in their first year? But I have a friend whos starting at 22 and worried about being seen as ‘too old’. I dont think anyone is too old ofc, but I’m curious what age is noticed as being -older-?

Edit: to clarify I’m asking your opinion, not what age someone would qualify for benefits / scholarships for being a mature student.