I celebrated 40th with a big Party, 60th with my DD, her OH & DGS. I am 63 this year & won't reach State Retirement Age until I'm 66 (took Early Retirement at 50 to care for DH). Might do something for 70th though.
DH celebrated 50th, 65th (retired on his Birthday), he was too ill to celebrate his 70th.
My DM is 90 next year, she started planning her celebrations last year, she's an optimist (most of the female line have lived well into their 90s). She knows what she wants to do. She also celebrated 70th & 80th. So it's all of us from Devon up to Yorkshire to celebrate with her & friends. Great-Granny to 2 adorable DGGSs, there'll be 4 generations present. Fingers crossed her health remains good
The King is to resume some duties.