(Shashtyabdapurti) Completion of 60 years and commencement of the 61st year, has to be celebrated grandly; generally, all birthdays are special and for completion of 60 years, you can visit Perumal temple and worship Him with special offerings; you can also do special Thiruvaradhanam for Perumal and offer food to four elders and if possible, recite Shrimad Ramayana and other such shlokas. The completion of 6s1st year generally is the same Tamil year in which one is born. During that time, you can conduct Tirumangalya dharanam, and other ceremonies.