The 125th jubilee is called a quasquicentennial jubilee. Jubilee is an anniversary of an event usually celebrated during the 25th, 50th, or 75th year.
octagenerian
Diamond Jubilee
Diamond Jubilee
Queen Victoria ascended the throne in 1837. * 1862 was her Silver Jubilee year (25 years). * 1887 was her Golden Jubilee year (50 years). * 1897 was her Diamond Jubilee year (60 years).
I am not so sure but I believe that it is called the Emerald Jubilee.
an 80th jubilee is called an octogenarion
diamond jubilee
Golden jubilee
names of jubilee years
platinum jubilee
Pope John XIIII declared the 2000 Jubilee Year.