very quick ànd useful update.
Can I do some more suggestions?
1. Don't enable the "Edit birthday" and "Delete birthday" buttons and (main and right-click) menu items if no birthday is selected.
(That's better than letting the user click/choose it and then saying "Please select a birthday to edit")
2. Make the button tooltips correspond the menu item texts ("birthday" vs. "entry")
3. Make the 'Day' columns by default as narrow as possible (to display the "Day" header). That way more space can be used for the name.
4. I don't know if AHK allowst it, but it would be great to be able to resize/maximize the application.
5. I was rather surprised that pressing ESC exits the application