Mahakumbhabhshekam
Sarvaroga Nivrityartham, Sarva Yaga Phalapradham 
Sarva Sampathkaramnreenam putrapoutrabhi vardhanam” 

Significance: According to Agama Shastras, a “punar uddhaarana Kumbhabhishekam” (Kumbha means Shikhara or crown of the shrine; Abhishekam means sanctification with spiritually charged water) is required every 12 years of Pratishta Mahotsavam of a temple. This ritual is required for rejuvenation and restoration of all the deities in the garbhagrahas in the temple complex to preserve full potency of infused power in the idols at an appropriate muhurtam on an auspicious day. New Vighrahas and additions to the temple are also consecrated at this auspicious time.

This occasion also gives an opportunity renew the dedication of devotees to the temple, re-affirm their faith, and their connection to the divine Almighty Lord. 

The first Kumbhabhishekam of Omaha Hindu Temple was celebrated on June 2003. We also had another kumbhabhishekam in 2004 after the completion of the Rajagopuram. The first 12-year Maha Kumbhabhishekam will be celebrated in the end of May 2015.

Navakalebara
"...vāsāḿsi jīrṇāni yathā vihāya
navāni gṛhṇāti naro 'parāṇi
tathā śarīrāṇi vihāya jīrṇāny
anyāni saḿyāti navāni dehī..."         
                                                 Srimat Bhagavat Gita

When the body becomes old, the soul discards it and takes on a new body.
“Navakalebara” means the new embodiment, is an ancient ritual associated with most of the Jagannath Temples. It involves a total replacement of the Idols (made up of margosa wood) of Lord Jagannath, Balabhadra, Subhadra and Sudarshan with the new ones and old images are given a sub-terranean consignment as a divine burial. This happens only in a year which has two months (Adhika masa) of Ashadha as per the Hindu calendar. This usually occurs every twelve to nineteen years. The last Navakalebara was in 1996 and happening this year after 19 years.