A 90th birthday anniversary is commonly referred to as a "90th birthday" or a "90th birthday celebration." Some people may also call it a "ninetieth birthday" or a "90th birthday milestone."
2002
The 90th Anniversary of the Royal Air Force will fall on 1st April 2008. (It was formed on 1st April 1918).
double Sapphire
red
Traditional anniversary symbols are based on years married and typically only go up to 75 (most people don't live long enough to be married longer). I was interested in this question since the choral society I belong to will be celebrating its 90th anniversary. I did find a couple references on the web that 90 was diamond and emerald (but listed as a modern symbol, not traditional). For a wedding anniversary gift you could go with jewelry with diamonds and emeralds in it. For an anniversary symbol for our choral society celebration I will probably suggest "Double Sapphire" since sapphire is for 45 years (2 times 45).
Nelson Mandela celebrated his 90th birthday by attending a concert held in his honor. The Nelson Mandela 90th Birthday Tribute was held on June 27, 2008.
It will be the year of the 90th Academy Awards.
90th, at 11 o'clock.
stone
he went to the USA
Their government. The people's republic of China. They just celebrated their 90th anniversary.