My stepmother (married my dad when I was in my 30s) has updated her Facebook status to say "thanks everyone for our anniversary messages. Not one". I'm fairly annoyed (have kept it light hearted and said Happy Anniversary) as it can only be aimed at a few people - she has no kids and my Dad has two of us.
Aibu to be annoyed? Are you supposed to remember other people's anniversaries? I guess if it was both parents I might be in the habit!