From the early 1990s until her retirement in 2005, she was the indisputable swing justice
Sandra Day O’Connor, the first woman to serve on the Supreme Court and the justice who held the court’s center for more than a generation, died Friday, the court said in a statement.
Her cause of death was complications related to advanced dementia and a respiratory illness. She was 93.
Chief Justice John Roberts said in a statement that O’Connor “blazed an historic trail as our nation’s first female justice.”
No this is completely different. The h is always silent in “hour”. It is not silent in “history”/“historic”. You can say “an 'istoric moment” if you insist but you’d better also say 'istory or 'istoric in other contexts otherwise you’re just being inconsistent.
Likely why it changed. Languages are fun and weird!