Historical clue formulations

• Mom of Princes William and Harry — 2021-06-14
• The People's Princess, to the people — 2020-10-16
• Prince Charles's onetime partner, affectionately — 2019-06-24
• The People's Princess, familiarly — 2019-06-05
• Prince William's mom — 2017-05-16
• Part of the "wedding of the century" — 2015-12-03
• Spectator who got a standing O at Wimbledon in 1981 — 2015-05-30
• Bride of 1981 — 2013-12-22
• She was on the cover of back-to-back issues of Time in September 1997 — 2013-01-24
• Celeb once called Her Royal Highness — 2009-12-11
• Blushing bride of '81 — 2003-12-04
• Celebrated bride of 1981 — 1998-04-20