Related Clues:

• Roe v. Wade et al.
• Many Guinness listings
• There are 12 in a year
• Ones for the record books
• Breakthroughs
• Precedent setters, often
• Groundbreakers
• Historic happenings
• Record book listings
• History-making events
• Novel things
• Historic events
• New records
• Unprecedented events
• Gold-medal wins