The attachment reminder is part of Thunderbird since ages. It's based on simple keywords which are recognized.
The birthday reminder could easily be added to GMail but I haven't seen it so far (However, Google calendar has it). It is a comic, anyway! It tends to exaggerate.
The birthday reminder could easily be added to GMail but I haven't seen it so far (However, Google calendar has it). It is a comic, anyway! It tends to exaggerate.