urate calculus uric acid calculus. urethral calculus a urinary calculus in the urethra; symptoms vary according to the patient's sex and the site of lodgment. uric acid calculus a hard, yellow or reddish-yellow urinary calculus formed from uric acid.
In some traditions, the first day of Christmas begins on the evening of December 25th with the following day considered the First Day of Christmas (December 26th). In these traditions, the twelve days begin December 26 and include Epiphany on January 6. The origin and counting of the Twelve Days is complicated, and is related to differences in calendars, church traditions, and ways to observe this holy day in various cultures (see Christmas).
Cite Article Details: Why is Christmas celebrated on December 25? Title Why is Christmas celebrated on December 25? Most Christians today probably canât imagine Christmas on any other day than December 25, but it wasnât always that way. In fact, for the first three centuries of Christianityâs existence, Jesus Christâs birth wasnât celebrated at all.