Dies Natalis Invicti Solis - the Birthday of the Unconquered Sun - is the celebration of the day when the nights begin to get shorter originating from various Roman sun-based cults, including possibly the Mithraic Mysteries. The Winter solstice is on 21 December, but the days don't start getting noticeably longer till about the 25th. Christianity took over this festival and adapted it in the form of Christmas (early Christianity and Mithraism had many parallels) in celebration of Jesus.
In the 4th century, just after Christianity became the official religion of the Ancient Roman Empire, Christmas (then called "Feast of the Nativity of the Christchild") was created and placed on December 25 in an effort to replace the existing pagan holiday, "Dies Natalis Solis Invicti" (English: Birth of the Unconquered Sun God) with a Christian holiday.
There are differing opinions as to what year December 25th was chosen to celebrate as the birth of Jesus, but the most likely time would have to be sometime between 170-236 AD. This was probably instituted to incorporate Christmas with the pagan festival dies natalis solis invicti, meaning the birth of the invincible sun god.
For classical Latin, basically it is pronounced exactly like it would be in English, except the vowels are different. A is pronounced a long A as in "Ah ha!" E is pronounced as a short A, as in "Ale" I is pronounced as a long E as in "Easy" O is pronounced as a long O as in "Oh no" U is pronounced EW, as in "Jew"
Hervaeus Natalis has written: 'De iurisdictione' 'Hervei Natalis Britonis'
In the year 350 Pope Julius fixed the date for the celebration of the birthday of Christ as December 25. The actual birth date is not known. The date was set to coincide with the Winter Solstice when pagans celebrated the Dies Natalis Invicti Solis- 'Birthday of the Unconquerable Sun.' Thus he made the celebration the 'Birthday of the Unconquerable Son.' However, there is ample evidence that Christ was born on/about December 25. For more information, click here.
Dies natalis means simply "birthday": dies is "day", and natalis is "natal; pertaining to birth" (natalis can be used by itself to mean "birthday" as well).If you wanted to say "Happy Birthday" you would say Felix Dies Natalis, or simply Felix Natalis.
Conus natalis was created in 1858.
Praealticus natalis was created in 1909.
Natalis Comes died in 1582.
Natalis Comes was born in 1520.
Hervaeus Natalis died in 1323.
Leo Natalis is 145 cm.