ok here's my repost, see below for Coruscant Local Calendar:
basically it boils down to:
24 hours a day
5 days a week
7 weeks a month
10 months + 3 "fete" weeks and 3 holidays = 368 days = 1 year
Tatooine
Tatooine is famous in Star Wars for being a planet with two suns on which young Anakin Skywalker was a young boy.
Located at the edge of the galaxy, Tatooine is a nexus of hyperspace shipping routes, making the planet's spaceport Mos Eisley a way station for traders. Far from the watchful eyes of the Empire, Tatooine also serves as a haven for frontiersmen such as smugglers, mercenaries, and bounty hunters, as well as the crime lord Jabba the Hutt. Only a few small human settlements and moisture farming communities (such as Anchorhead and Bestine) dot the barren surface of the planet. The deep deserts and wastelands are left to the native Jawas, the nomadic Sand People, and the strange life forms inhabiting remote areas.
Each day is 23 hours long, and the year has 304 days. In Tatooine, "First Dawn" refers to the time period between when the first and second suns rise. "First Twilight" is the time period between when the first and second suns set.
Tatooine
A harsh desert world orbiting the twin suns Tatoo I and Tatoo II, this arid planet is covered with sodium-rich deserts, deep rocky canyons, and endless dunes.
Tatooine is the primary planet in the Tatoo system, this desert world is located in the Arkanis Sector of the Outer Rim Territories near Piroket and Ryloth. It is close enough to a major hyperspace nexus to make it easy to get to such worlds as Coruscant and Corellia, but its environment makes it one of the most inhosptiable places in the galaxy. The planet's twin suns mercilessly heat the planet, keeping the sodium-rich deserts alive. The planet has a single, natural satellite.
Several decades before the Battle of Yavin, settlers arrived to colonize this first world in what was then called the J11.9 system. They coined the name Tatooine from the Jawa name for the planet, Tah doo Een e. The settlers established strongholds on the planet, and many smugglers and criminals have set up operational bases in its wastelands. The settlers there are primarily moisture farmers, extracting what little water they can from the atmosphere for survival. Its location on the galactic fringes makes it a perfect base for smugglers, mercenaries, and bounty hunters. The planet, despite its hostile ecology, supports human life was well as the native races of Jawas, krayt dragons, and Tusken Raiders. The planet's remote location appealed to Owen Lars and his wife Beru, and they lived there with Luke Skywalker for many years. Tatooine's average day lasts 23 standard hours, and its year consumes 304 local days. Note that the Star Wars Journal: Anakin Skywalker claims Tatooine is located not only near several hyperspace routes, but also near other galaxies.
Anakin on Tatooine.
Mistakes on film: One shadow, but there are two suns.
It is interesting to imagine some of the possibilities of a planet with two suns. Are both suns on the same orbit, but simply in different points of that orbit? Or are they on separate orbits that cross paths? What if the two orbits were perpendicular or parallel to each other? How do their orbits relate to Tatooine's orbit? What would things look like on Tatooine if the two suns crossed, were at the same or opposite sides of Tatooine, or any other arrangement of the three planets you can imagine? What would the shadows on Tatooine look like? What about the length of day, night, or the seasons?
Standard time
The standard hour and year are marked by Coruscant's local hour and year. A standard minute consists of 60 seconds; an hour consists of 60 minutes; a day consists of 24 hours. A standard week consists of 5 days; a month consists of seven weeks. A standard year is 368 days, including ten months, three fete weeks and three other holidays.
According to Rebellion, Coruscant is located in Sesswenna Sector. Coruscant Standard Time is the galactic standard time reference, and was used to indicate the current time on the planet Coruscant, no matter where a being was in the galaxy. Many planets provided two time measurements: local time and Coruscant Standard Time. The dating systems of the Galactic Republic and Galactic Empire are unknown.
Coruscant
The seat of galactic government for as long as records have existed, Coruscant is the jewel of the Core Worlds and the center of the known universe. Nearly all of the planet's land is covered by an unending, multileveled megalopolis whose foundations were laid at the beginning of the Old Republic, more than a thousand generations ago.
Air buses, Imperial City in Coruscant
The vast population of Imperial City uses many means of transportation, including ocean-liner sized air buses which dock at dizzying heights above ground level.
Coruscant is located at galactic coordinates (0,0,0), this planet in the Core Worlds was home to the Old Republic. It was renamed Imperial Center by Emperor Palpatine. When the New Republic was born, the planet was renamed to Coruscant. It has two moons, and orbits a small white sun.
The planet's entire landmass has been covered (over the thousands of generations spanning galactic history) by multiple levels of the buildings that make up Imperial City. This means that there is little land available for growing food, and no natural rivers or lakes to provide water. To solve the dilemma of feeding and watering millions of inhabitants, many of Coruscant's architects build self-contained ecosystems into their buildings. Engineers have developed a series of huge pipes through which polar ice water is pumped to the cities. Nearly everything on the planet is recyclable, from clothing to packaging and machinery. It was the center of all the Old Republic's activities, and helped describe Galactic Standard time.
The Imperial Senate was convened there. When Palpatine assumed control of the Senate and the rest of the government, he established that Coruscant would remain the center of his Empire. He began a massive work effort to shape Coruscant to his desires, including installing a large number of surveillance systems. Following the Battle of Endor, Mon Mothma moved the New Republic onto Coruscant and again re-established the center of the Republic there. This came after the planet was liberated from Ysanne Isard, and the New Republic overcame the threat of the Krytos virus. Unbeknownst to all, Isard's infamous Lusankya prison facility was hidden in the Super-class Star Destroyer Lusankya, which was buried beneath Imperial City. Following the death of Grand Admiral Thrawn, the Imperial Inner Circle began attacking Coruscant in an effort to regain the center of the galaxy for the Empire. This attack was driven back just before the Emperor was reborn as a clone, but the damage to the planet's resources was horrendous. Also, the immediate space surrounding the planet was littered with starship wreckage for many years to follow. Once the reborn Emperor was destroyed, the New Republic began cleaning up the planet to make it more presentable as the center of the galaxy.
Days & months
Most of Star Wars uses a five day week, and a ten month year. Following are the days and the months in the Tapani Sector, which correspond almost directly to the Coruscant local calendar. The Tapani Sector is an area of the Colonies region of the galaxy which is considered a respected part of the Core Worlds, due to its proximity and wealth.
Days of the week:
Day Name
first day Atunda
second day Katunda
third day Satunda
fourth day Datunda
fifth day Natunda
Months of year:
Month Name
first month Elona
second month Kelona
third month Selona
fourth month Telona
fifth month Nelona
sixth month Helona
seventh month Melona
eighth month Yelona
ninth month Relona
tenth month Welona
Various Star Wars holidays
Expansion Week a holiday celebrated throughout Tapani Sector, Expansion Week comes just before the upper class Capital Season. It fell between the months of Selona and Telona. (LE, PGT)
Harvest Day a holiday celebrated in Tapani Sector, it was first observed by the original settlers of the sector. The exact origins of the holiday are have been lost over time, but it is believed that the settlers traditionally commemorated the time of harvesting their crops on this day. In modern times, it is simply a day off from work. Harvest Day fell between the months of Yelona and Relona on the Tapani local calendar.
Mofat a Polneyi month or season. Platt Mallar reported that the Yevethan attack on Polneye took place on the 40th day of Mofat.
Month of Plenty this Weequay holy season honored the moon god Quay. Temples on the planet Sriluur which were dedicated to Quay had an open skylight in their roof which allowed Weequay priests to track the moon's progress during this month.
Productivity Day this Tapani Sector holiday fell between the months of Nelona and Helona.
Shelova Week this traditional Herglic holiday celebrates commerce and family, two things which are interrelated to the Herglic race. A prominent holiday in the Tapani Sector, Shelova Week is a time to exchange gifts, make new business alliances, discuss trade arrangements, and spend time with family members. As the human population of the sector began interacting with the Herglics, they too began celebrating the holiday, although many humans simply take vacation instead of also developing business partnetships. On the Tapani local calendar, Shelova Week fell between the months of Helona and Melona.
Tapani Day this holiday, celebrated in Tapani Sector, was held annually just after the month of Kelona, and before the month of Selona.
Thulpin this is the name of the summer growing season on the planet Draenell's Point. It lasts about 14 standard months, making up about a fourth of the planet's long year.
Winter Fete this is a holiday observed in Tapani Sector, and originally marked the winter equinox on the planet Pelagon. The settlers there were the first to celebrate Winter Fete, and when they began settling other planets in the sector, the holiday went with them. Over time, the holiday was modified to coincide with Coruscant's Fete Week. In the current Tapani local calendar, Winter Fete falls on the very last week of the year, following the month of Welona.
Months on other planets
Two other planets are Ithull (Stenness system), the homeworld of the Colossus Wasp and the Ithullan race. The Ithullans were wiped out by the Mandalorians. A year on the planet lasted 25 standard months. Also, Tiss'sharl, which is a mild planet is the homeworld of the Tiss'shar race. It is covered with perilous, humid jungles. The average year on Tiss'sharl lasts 11 standard months.
http://webexhibits.org/calendars/calend ... l#starWars