Included in the Queen's calendar are events that she attends every year, or every few years, and we've flashed back to many of those events. This is not a comprehensive series; there are many annual events not listed here.

Annual Events
March: Commonwealth Day Observance Service
March/April: Royal Maundy Service 
March/April: Easter Service
April: The Queen's Birthday 
May: Chelsea Flower Show
June: Trooping the Colour 
June: The Garter Service 
June: Royal Ascot 
September: Balmoral Ghillies Ball
November: Remembrance Events 
November/December: Diplomatic Reception 
December: Christmas Broadcast 
December: Christmas Service
Varies: The State Opening of Parliament 

Semi-Annual Events
The Order of Merit (Presentations and Service) 
Commonwealth Heads of Government Meeting (Dinner) 
The Order of the Bath Service 

Special Events
The Queen's reign has also seen many special occasions - some that are historic, some that are personally significant, some that are both. These are the special events that have been featured on the blog so far:

Royal Weddings
1960: Princess Margaret and The Earl of Snowdon
1963: Princess Alexandra and the Hon. Angus Ogilvy
1973: Princess Anne and Captain Mark Phillips
1986: The Duke and Duchess of York 
2005: The Prince of Wales and Duchess of Cornwall
2011: The Duke and Duchess of Cambridge
2018: The Duke and Duchess of Sussex
2018: Princess Eugenie and Jack Brooksbank 
2019: Lady Gabriella Windsor and Thomas Kingston 
2020: Princess Beatrice and Edoardo Mapelli Mozzi

1947: The Queen's Wedding

1953: The Coronation

2012: The Diamond Jubilee
Events were held throughout the year for the Jubilee including visits around the country, these are just a few of the headliners:
Address to Parliament
Windsor Horse Show Pageant
Sovereigns' Luncheon
Armed Forces Parade and Muster
Thames River Pageant
Jubilee Concert
 The Thanksgiving Service
 Diamond Jubilee Message
 Commonwealth Luncheon
Lunch at Downing Street

2012: London Olympics
IOC Reception
Visit to Olympic Park
Heads of State Reception
The Opening Ceremony of the Olympic Games
The Opening Ceremony of the Paralympic Games

2016: 90th Birthday
Birthday Walkabout in Windsor
New Four Generation Stamp Release
New Annie Leibovitz Portrait Releases
90th Birthday Celebration at Windsor
More New Annie Leibovitz Portraits
National Service of Thanksgiving
Trooping the Colour
The Patron's Lunch