Every calendar date has a quiet membership roll — a list of people who never met, will probably never meet, and still share the one thing that got each of them here. October 4 has a good roster. If today's your birthday, you're already in it, whether or not you've ever thought about who else is on the list.

Susan Sarandon has been a working, headline actor since the 1970s, with an Oscar-winning turn in Dead Man Walking and a career that's ranged from Thelma & Louise to Bull Durham to decades of outspoken public activism. She's built a reputation as someone who says what she thinks, publicly and often, without much interest in softening it. It tracks that a Libra would pair that bluntness with real charm — the sign's reputation is for fairness and connection, and Sarandon's public persona has managed to be both a provocateur and, by most accounts, likable doing it.

You'll never meet most of the people who share your birthday, and that's sort of the point — the connection doesn't need proof to be real. It's a small, strange kind of company. Worth noticing, once a year.