Shastiapthapoorthi  or 60th Marriage 

Sashtiapthapoorthi is the marriage ceremony performed for the couple where the husband has completed 60 years of age and 61^st year has started

Bhima Ratha Shanthi or 70th Marriage

Bhima Ratha Shanthi is the marriage ceremony performed for the couple where the husband has completed 69 years of age and 70th year has started.

Sathabhishekam or 80th Marriage

Sathabhishekam is the marriage ceremony performed for the couple where the husband has completed 80 years and 8 months of age. Sathabhishekam Ceremony is performed on the janma nakshatra day of the husband.