I'm not really a birthday person in general, so no, not that specific thing, but I definitely have a set of like five to ten past coworkers who I really respect

I'm not really a birthday person in general, so no, not that specific thing, but I definitely have a set of like five to ten past coworkers who I really respected and enjoyed working with, some as peers and some as managers and mentors, and maybe about once a year I'll think "I wonder how XYZ is doing" and reach to them.