A regnal year is a year of the reign of a sovereign, from the Latin regnum meaning kingdom, rule.

The oldest dating systems were in regnal years, and considered the date as an ordinal, not a cardinal number. For example, a monarch could have a first year of rule, a second year of rule, a third, and so on, but a zero year of rule would be nonsense. Applying this ancient epoch system to modern calculations of time, which include zero, is what led to the debate over when the third millennium began.

In ancient times, calendars were counted in terms of the number of years of the reign of the current monarch. Reckoning long periods of times required a king list. The oldest such reckoning is preserved in the Sumerian king list.

In England, and later the United Kingdom, until 1963, each Act of Parliament was defined by its serial number within the session of parliament in which it was enacted, which in turn was denoted by the regnal year or years in which it fell. (See Regnal years of English monarchs)

Saint George (c. 275/281 – 23 April 303) was, according to tradition, a Roman soldier from Syria Palaestina and a soldier in the Guard of Diocletian, who is venerated as a Christian martyr. In hagiography Saint George is one of the most venerated saints in the Catholic (Western and Eastern Rites), Anglican, Eastern Orthodox, and the Oriental Orthodox churches. He is immortalized in the tale of Saint George and the Dragon and is one of the Fourteen Holy Helpers. His memorial is celebrated on 23 April, and he is regarded as one of the most prominent military saints.

Many Patronages of Saint George exist around the world, including: Georgia, England, Egypt, Bulgaria, Aragon, Catalonia, Romania, Ethiopia, Greece, India, Iraq, Lithuania, Palestine, Portugal, Serbia, Ukraine and Russia, as well as the cities of Genoa, Amersfoort, Beirut, Botoşani, Drobeta Turnu-Severin, Timişoara, Fakiha, Bteghrine, Cáceres, Ferrara, Freiburg, Kragujevac, Kumanovo, Ljubljana, Pérouges, Pomorie, Preston, Qormi, Rio de Janeiro, Lod, Lviv, Barcelona, Moscow, Tamworth and the Maltese island of Gozo, as well as of the Scout Movement and a wide range of professions, organizations and disease sufferers.

Nebuchadnezzar II (ⁱ/nɛbjʉkədˈnɛzər/; Aramaic: ܢܵܒܘܼ ܟܘܼܕܘܼܪܝܼ ܐܘܼܨܘܼܪ ‎; Hebrew: נְבוּכַדְנֶצַּר‎‎ Nəḇūḵaḏneṣṣar; Ancient Greek: Ναβουχοδονόσωρ Naboukhodonósôr; Arabic: نِبُوخَذنِصَّر nibūḫaḏniṣṣar; c 634 – 562 BC) was king of the Neo-Babylonian Empire, who reigned c. 605 BC – 562 BC. According to the Bible, he conquered Judah and Jerusalem, and sent the Jews into exile. He is credited with the construction of the Hanging Gardens of Babylon and also known for the destruction of the First Temple. He is featured in the Book of Daniel and is also mentioned in several other books of the Bible. The Akkadian name, Nabû-kudurri-uṣur, means "O god Nabu, preserve/defend my firstborn son". Nabu is the Babylonian deity of wisdom, and son of the god Marduk. In an inscription, Nebuchadnezzar styles himself as Nabu's "beloved" and "favourite".

His name has previously been mistakenly interpreted as "O Nabu, defend my kudurru", in which sense a kudurru is an inscribed stone deed of property. However, when contained in a ruler's title, kudurru approximates to "firstborn son" or "oldest son". Variations of the Hebrew form include נְבוּכַדְנֶאצַּר and נְבוּכַדְרֶאצַּר (Nəḇuḵaḏreṣṣar). He is also known as Bakhat Nasar, which means "winner of the fate", or literally, "fate winner".^{[citation needed]}