Interfaith days, January 5th, Guru Gobind Singh Jayanti, 12th Night

In Sikhism, the birthday of Guru Gobindh Singh is observed this year on January 5th. He was the tenth and last of the living Sikh gurus. He founded the Khalsa (the collective of all initiated Sikhs) and passed the sacred authority to the holy book of the Sikhs, the Guru Granth Sahib.
http://sgpc.net/gurus/gurugobind.asp and http://www.sikhiwiki.org/index.php/Guru_Gobind_Singh

Today is Twelfth Night, the Christian observance of the close of Christmastide. http://www.crivoice.org/cy12days.html

It is also New Year in Mahayana Buddhism. Here is an interesting essay about the day: http://www.beliefnet.com/Faiths/Buddhism/Articles/The-Buddhist-and-The-New-Year.aspx

(From the 2015 Interfaith Calendar of the Diversity Awareness Partnership of St. Louis---see dapstl.org for more information---and various online sources.)