*pulykamell (Turkey Breast), sajnálom, barát! I overlooked that you were first with the Magyar. Rosszom (my bad).
As for Hindustani days of the week:
I made a mistake — itvâr for Sunday does not mean ‘Lord’s Day’; it comes from Sanskrit aditya ‘Sun’ + -vâr. In Sanskrit, ravi and aditya are two words for the Sun, in addition to the usual sûrya.
So Urdu has kept the old planetary names for Sunday, Tuesday, Wednesday, and Saturday. It replaced Monday with a Persian name, Friday with an Arabic name, and Thursday with an Arabic-Hindustani compound. For Saturday, some Urdu speakers use the planetary name sanîcar, and some use the Persian word haftah meaning ‘seven’ or ‘week’. Why in heaven’s name they use the Persian word pîr (‘old man’) for Monday, I have no idea. Is it the Old Man in the Moon? kaun jântâ hai?
xtnjohnson, dômo arigatô gozaimasu — I had looked up the Japanese names but didn’t know how to explain them. This is perhaps the most interesting set of meanings yet. The Sun and Moon matching the other systems (probably via Buddhism from India, originally Babylonian), plus the five elements of Chinese cosmology: Fire, Water, Wood, Metal, Earth. The Japanese use “Gold” to stand for Metal. Nice. So I guess the traditional Chinese names must have followed this pattern, and the modern numerical names are a Red Chinese reform? I gotta ask my acupuncturist about this! I noticed that sui for ‘Water’ is a Chinese on kanji word; aren’t these all on Chinese words in Japanese?
I am certain that the Lithuanian numerical names must have been a replacement for their original mythological names. Lithuania was the last pagan country in Europe — they didn’t go Christian until the fourteenth century. A few very ancient Lithuanian folksongs survive, using the Sun, Moon, and other cosmic symbols to preserve the metaphysical wisdom of the ancient sages from being lost. They knew that folksongs are more likely to endure than any other form of cultural transmission. I wonder what the original Lithuanian names were? It would afford a glimpse into a deep level of Indo-European prehistory.
What were the pre-Christian names in Greek? The same planetary pattern as the Babylonians’, I would venture. Are there any Koine Greek days of the week mentioned in the Septuagint or the New Testament? Any Bible scholars here?