Yajur Upakarma

This is a thread changing ceremony performed by the Hindu brahmins. It falls on the Raksha Bandhan day which usually is celebrated in the August 2nd week.

For those who are dazed as to what the significance of upnayanam is
http://www.ramanuja.org/sv/rituals/upakarma/significance.html

I had to change my sacred thread today and had to google for the shlokas ie., the verses to be told while discarding the old one. Did a lot of (improper) googling and luckily found a site where instructions were given.

After the changing, I found a much better site giving directions:
http://www.ahobilam.com/upakarma/index.htm
This one is too good a site which gives in detail whats to be done.

The links which I used were:
http://www.ramanuja.org/sv/bhakti/archives/aug99/0175.html
http://www.panchangam.com/default.htm