# Timeline of Jijo - David Brin's Uplift Universe

This page contains spoilers about Brightness Reef and Infinity's Shore. Those who haven't read those books and plan to read them should exit immediately. I will refer to these books by their initials, BR and IS.

The official David Brin site is www.davidbrin.com, and it includes samples of the books. The complete Uplift timeline can be found at Stewart Blandón's site or at Trent Shipley's site

I am also building an Uplift timeline, that is more "canonical" than the above timeline, since mine is based on the books.

## Units of Time

Many different time units are used in the Uplift Storm Trilogy. I will try to summarize them:
• Terran units (year, month, day, hour, minute, second). Probably used by Earthlings, but not by Daniks or Humans of Jijo.
• Jijo units (year, month, day). Probably used by Jijoans. I don't know yet how to correlate Jijo's Month (also referred as Lunar Cycle) with the three moons. I've been testing those hypotheses:
• The Lunar Cycle corresponds to Loocen's Synodic Period. This can't be true, because Loocen's Synodic Period [the period between two New Moons] is too small
• The Lunar Cycle corresponds to Torgen's or Passen's Synodic Period. This might be rejected, because it doesn't make sense to use a lesser Moon to define a Lunar Cycle.
• The Lunar Cycle corresponds to some combination of the Two Biggest Moons - Loocen and Torgen - for example, the 1st day of each month corresponding to their conjunction.
• The Lunar Cycle corresponds to some combination of the Three Moons. This would require that the Three Moons would have their orbital motions somehow correlated. This is good, because IMHO the only way an Earth-like planet can have three moons of appreciable size is when those three moons are locked up into a resonance [like Jupiter's Io, Europa and Ganimedes]. The 1st day of each month would then correspond to some relative configuration of the three, for example, Loocen and Torgen in conjunction and Passen 90 degrees behind them.
• Galactic units (midura, pidura, etc).
These units can be related by:
• Jijo Year 1930 has 17 Jijo Months (Alvin, in the beginning of BR). It's not possible to know if this relation is valid for all Jijo Years, but I conjecture that Jijo must use a luni-solar calendar [like Earth's Jewish Calendar].
• In BR, VIII, Lark, Ling tells Lark that Humans entered Galactic Civilization 350 Jijo Years ago. Using the number in the Uplift Timeline of 280 Earth Years for this same period, we can get an accurate ratio for the ratio (Jijo Year):(Earth Year). A Jijo Year has 292.2 Earth Days. The numbers in the Uplift Timeline do not fit the books (check my Error Page), but this period of 280 Earth Years still holds - approximately. This period may be anything from Earth Years, for a duration of a Jijo Year varying from Earth Days.
• The Glossary of IS translates the Galactic units into Earth units:
```1 dura   = 1/3 minute
1 kidura = 1/2 second
1 midura = 71 minutes
1 pidura = 67 duras =~ 4 days
```
Last relation is a typographical error; using 350 * 17 Jijo Months = 280 * Earth Years = 280 * 365.25 * 1440 minutes, we get 4 Jijo Months = 99004 minutes; using 1 midura = 63 duras we get 1 pidura = 64 miduras = 64 * 71 minutes = 92016 minutes. In other words, 1 pidura is almost 4 Jijo Months, and not 4 Jijo days. The other units fit into a base 6 system:
```1 kidura = 6-2 duras = 1/2 second
1 dura   = 60 duras = 1/3 minute
1 midura = 63 duras = 71 minutes
1 jadura = 65 duras = 43 hours
1 pidura = 67 duras = 4 Jijo Months or 2 Earth Months
```
• Half Jijo Day is, at least, 5 miduras long: in BR, II.Book of the Slope, Dwer, Dwer sets 5 tobar seeds to be consumed during the night, each one taking a midura.
• This gives an upper limit of (Jijo Year:Jijo Day) = (Jijo Year:Earth Day) / (Jijo Day:Earth Day) = / (Jijo Day:Midura) * (Earth Day:Minute) / (Midura:Minute) = / (2 * 5) * 1440 / 71 = Jijo Days per Jijo Year. On the other hand, Humans seem well adapted to Jijo's cycle of day and night, so Jijo's day can't be longer than 48 hours, giving a lower limit of (Jijo Year:Jijo Day) = (Jijo Year:Earth Day) / (Jijo Day:Earth Day) = Jijo Days per Jijo Year.
• Also, when the Urunthai take Sara, Emerson, and other people, they begin travelling after Sunset, and there are at least 3 miduras before midnight. This gives an upper limit of (Jijo Year:Jijo Day) = Jijo Days per Jijo Year.
Using the above relations as starting points and doing some lenghty computations based on the books, it's possible to conclude that:
• Jijo Year 1930 (when all action of BR and IS happen - not counting, of course, flashbacks) must have between Jijo days.
• a Jijo Day, then, corresponds to (Jijo Day:Earth Day) = (Jijo Year:Earth Day) / (Jijo Year:Jijo Day) = Earth days.
• Using Galactic Units, a Jijo Day corresponds to miduras.
• In one midura, Jijo rotates - relative to Jijo's Sun - of an angle between degrees.

## Timeline, by days

I still can't fit all events into a unique timeline, because there are too many ambiguities. For example, if we follow Sara from the day she left Dolo Dam to the day she arrives in Mount Guenn, it seems that only a few days have elapsed. But this period corresponds to the date of the arrival of the Rothen until two days after the Battle of the Glade, and (in other characters' accounts) this period is months long! So, we must assume that Sara spend a long time in Tarek Town and in Biblos!

The errors that are obvious are marked in Red with the suggested correction in Green . Deductions are in Blue .

I decided to break the timeline into five sets, each set, internally, with fixed dates.

### Reference: arrival of the Rothen

 Book reference Day Hour Event Loocen Torgen Passen BR II. Asx 0 noon The Rothen/Danik ship lands in the Gathering Glade BR II. Sara 1 00:00 or so Meeting in Dolo Dam rising BR IV. Sara 1 dawn Sara et al leave Dolo Dam in ship Hauph-woa down river Roney BR IV. Sara 1 sunset Ship Hauph-woa reaches Unity Point BR IV. Sara 2 00:00 +/- some hours River Roney lit by two moons not visible visible visible BR VI. Sara 2 morning Ship Hauph-woa is ambushed in Bing Village BR VIII. Sara 2 mid-afternoon Ship Hauph-woa reaches Canyon Country BR X. Sara 2 late afternoon Concert in ship Hauph-woa to celebrate The Stranger's recovery BR X. Sara 2 almost nightfall Ship Hauph-woa arrives in Tarek Town

### Reference: Robot Battle in One-of-a-Kind's Lair

Some events of this partial timeline overlap the events of the above timeline. However, I can't get an exact correlation between the two.
 Book reference Day Hour Event Loocen Torgen Passen BR II. Asx -3 or -2 noon The Rothen/Danik ship lands in the Gathering Glade BR II. Dwer -2 1/2 midura before sunset Dwer captures a glaver in the Rimmers BR II. Dwer -1 before dawn Rety steals Dwer's bow BR II. Dwer -1 pre dawn Dwer wakes and notices that his bow had been stolen hovering over sillouetted peaks BR VI. Dwer 0 nightfall A Danik Robot attacks the Bird-Robot In the battle, they destroy each other while destroying One-of-a-Kind

### Reference: Battle of the Glade

 Book reference Day Hour Event Loocen Torgen Passen BR XX. Sara -4 or -3 sunset Sara et al leave Biblos at sunset implicit -3 or -2 Sara et al reach Kandu Landing BR XXIV. Sara -2 sunset Sara et al leave Kandu Landing and begin the crossing of Warril Plain BR XXIV. Sara -1 dawn Sara et al come to Uryutta's Oasis visible before dawn BR XX. Lark -1 afternoon Lark begins writing letter to Sara to be delivered to Biblos BR XXIV. Sara -1 afternoon UrKachu's Urunthai take control of Caravan Books burned Jop's companions come before sundown BR XX. Lark -1 sunset The Danik scoutship leaves Gathering Glade and goes to the Gray Hills rising BR XXII. Dwer -1 a midura past sunset The Danik scoutship passes over Dwer in its way to the Gray Hills BR XXIV. Sara -1 post-sunset of BR_p503 Caravan split in two Faster group goes South Moonlit pool with Blade not visible; see below BR XXIV. Sara -1 post-sunset of BR_p503 + at least 2 miduras Second blood-stop rising BR XX. Asx -1 night Zealots destroy the buried Rothen cube using explosives two moons casting beams at crater BR XXIV. Sara -1 post-sunset of BR_p503 + at least 3 miduras = midnight Third (?) blood-stop BR XXIV. Sara 0 dawn Sara et al stop at dawn, outside Warril Plain BR XXIV. Lark 0 morning Lester Cambel turns on the psi-emiters BR XXII. Dwer 0 during the day lots of stream crossings in the Gray Hills BR XXVI. Sara 0 afternoon Urunthai and Jop's fanatics are subdued by the Good Guys BR XXVIII. Sara 0 sunset Blade comes with Ulgor BR XXVIII. Sara 0 sunset + several miduras up in the sky BR XXIV. Asx 0 after sunset The Rothen Ship returns in search for Ro-kenn et al BR XXVIII. Lark 0 night Polkjhy, the Jophur Ship, arrives on Jijo BR XXVIII. Sara 1 00:00 Rothen ship returns Jophur ship comes Emerson returns with donkeys Ulashtu and the Ilias come IS Part One, Sooners, Sara 1 00:00 h to 03:00? Running South with Ilias through Central Slope not visible but should be visible not visible pale light IS Part One, Sooners, Sara 1 03:00? h to sunrise Running South with Ilias through Central Slope rising IS Sooners The Stranger 1 sunrise flashbacks of Emerson BR XXII. Dwer 1 morning Dwer at al are blocked by a mighty ravine; party splits, searching for a pass IS Part Two, Lark 1 probably during the day Ling sees Lark and Uthen's book in late One of a Kind's lair IS Part Two, Sara 1 midday to sunset crossing of Great Marsh IS Part Two, Sara 1 sunset Arrival at River Gentt Party enters Tunnel under River Gentt IS Part Three, Sara 2 afternoon Arrival at the city of Xi, in the Spectral Flow not visible not visible not visible IS Part Three, Sara 2 sunset; few miduras after Sara arrived at Xi Rest of Horsewomen and Urs arrive at the city of Xi not visible not visible near far west horizont but should be in the eastern part of the sky IS Part Five, Emerson 2 and 3 from sunset to sunrise Emerson at Xi visible during the night, probably rises during the night IS Part Five, Sara 3 day Sara et al go from Xi to Mount Guenn Sara suffers an accident while climbing BR XXII. Dwer 3 noon Dwer arrives at Falls He detects Ul-Tahni's band, that had been here BR XXII. Dwer 5 to 7 Dwer returns to Falls with Lena, Jeni and Danel BR XXII. Dwer 6, 7, and 8 from 00:00 to 06:00 Dwer's tactic: wake after midnight and scout under the light of two small moons visible visible IS Part Three, Dwer 10 day The Danik aircraft is bombing the Rift

### Reference: aerial battle in the Gray Hills beach

This table overlaps nicely with the above table, with a 10 days difference. In other words, the aerial battle at the Grey Hills beach happens exactly 10 days after the Battle of the Glade.
 Book reference Day Hour Event Loocen Torgen Passen BR XXII. Dwer -5 to -3 Dwer returns to Falls with Lena, Jeni and Danel BR XXVI. Rety -3 ? Ul-Tahni and 12 urs are imprisoned in Rety's Band's Prison BR XXVI. Dwer -2 evening Dwer expedition plans next action pre-moonrise dimness not visible not visible not visible or should it be visible? BR XXVI. Dwer -1 a midura after midnight Dwer wakes up Danel is trying to talk to Mudfoot two moons rising BR XXVI. Dwer -1 morning Kunn and Jass leave the Gray Hills and go to the Gray Hills beach Dwer, Lena and Danel attack the Danik Robot Danel Ozawa is killed The Danik Robot, carrying Dwer, Mudfoot, Rety, and Yee, go South IS Part Three, Dwer 0 day The Danik aircraft is bombing the Rift IS Part Three, Dwer 0 day A Jophur corvette battles with the Danik airplane IS Part Six, Dwer 0 1/2 midura after nightfall Dwer plans attack against Jophur corvette not visible not visible visible IS Part Seven, Kaa 1 00:00 - 12:00 Dolphin raid in Gray Hills beach captures Kunn, Jass and the Jophur Dwer, Mudfoot, Rety, and Yee enter the submarine Hikahi IS Part Seven, Kaa 2 morning Kaa and Peepoe leave Kaa's Outpost and go to a cave near the volcano IS Part Eight, Kaa 4 to 9 day Mopol and Zhaki atack Kaa and kidnap Peepoe

### Reference: capture of Biblos by the Jophur

 Book reference Day Hour Event Loocen Torgen Passen IS Part Eight, Kaa -1 day Mopol and Zhaki atack Kaa and kidnap Peepoe IS Part Eight, Blade -1 afternoon Blade departs from the ruins of Ovoom Town in a baloon going to set after sunset going to rise after Loocen sets IS Part Nine, Kaa 0 00:00 - 06:00 Kaa saves a hoon from drowning, at Wuphon Port not visible rising IS Part Nine, Nelo 0 morning The Jophur capture Biblos Maybe it's necessary to add one day here IS Part Nine, Kaa 0 nightfall The Submarine Hikahi enters Wuphon Port IS Part Nine, Alvin 0 18:00 - 24:00 After meeting of Gillian and Uriel Heavy clouds cover Western sky visible in the East, close to Izmunuti IS Part Ten, Dwer 0 00:00 plus or minus some hours Dwer begins his Baloon trip IS Part Ten, Dwer 1 at sunrise Polkjhy races towards ballons IS Part Ten, Gillian 1 soon after sunrise Streaker leaves Jijo between Jijo and Izmunuti

## My Hypotheses

### Loocen lower than Torgen ?

All the books refer to Loocen as the first and Torgen as the second moon; I guessed that this was size and distance from Jijo. This has to be checked against the books.

### Jijo Month = Loocen Synodic Month ?

Using the fact that Asx refers to the date of the Rothen arrival as
It was springtime, early in the second lunar cycle of the nineteen hundred and thirtieth year of our exile-and-crime, when the Rothen arrived, manifesting unwelcome in our sky. (...)
(BR, II. Book of the Slope, Asx), together with a statistical overlap of my estimations of a Jijo Month and Loocen's synodic period, I supposed that a Jijo Month were the period from a New Loocen to the next New Loocen.

However, this hypothesis can be easily disproven. Early in a lunar synodic month means that the Moon is Waxing Crescent, or that the Moon sets during the night (soon after New Moon it sets soon after sunset; and just before Full Moon it sets just before sunrise; but it never rises during the night - see The Moon: an Introduction for more details about the phases of the Moon). But in Chapter II Dwer, at the time Rety steals his bow, he observes Loocen over sillouetted peaks before dawn, and in Chapter II Sara there is a meeting in the night after the Rothen arrival, and Loocen rises during this meeting

Using an other origin for Loocen's Month still can't give the correct number of days per month, because Loocen Synodic Month is too small.

### Jijo Month = Torgen Synodic Month ?

I tested this hypothesis hoping that it would not be true; Torgen is the second moon (probably only in brightness but not in distance from Jijo), and there's no reason it would be chosen as the month reference.

Alas, I guess I can disprove it with a reasonable certainty: from the tables, above, notice three Torgen risings from the period from midnight to dawn; these three risings are set apart by at least 5 days (see BR p.543, IS p.38, and IS p.503), later when I find time to write what I calculated O:-)

### Under Construction

Preliminary Numbers:
• Loocen Synodic Period from 4 to 8 Jijo Days
• Torgen Synodic Period from 4 to 12 Jijo Days
• Passen Synodic Period above 2 Jijo Days

## The Timeline

This timeline uses Jijo units of Time. When a date in Earth units is more accurate than the date in Jijo units, I will give it. Otherwise, chech my Brin Timeline.

Like my other timelines, I will put some arrows to help the reader follow some characters. However, I decided to represent uncertainty by a color code, from green, representing a direct quote from the canon, to red, when the canon can only give an approximate date. Or: Error > 1000 Years, Error 100-999 Years, Error 10-99 Years, Error 1-9 Years, Exact Year.

• The g'Keks come to Jijo

• The Traekis come to Jijo

• The Glavers come to Jijo

• Soon after, they enter the Path of Redemption

• The Qheuens come to Jijo

• The Hoons come to Jijo

• The Urs come to Jijo

• Contact: Humans enter the Civilization of the Five Galaxies (Year 2211 AD )

• Humans come to Jijo

• Biblos is built

• First Human - Ur War

• Second Human - Ur War

• Drake the Elder is born

• Horse Genocide: the horses of Jijo are killed

• Third Human - Ur War

• Drake the Elder destroys the Urunthai, a human-hating Ur clan

• Fire at Biblos, about 1/3 of the books are lost

• Dolo Dam is built

• Drake is born

• Siege of Tarek: the Gray Qheuens are defeated

• The Holy Egg appears

• Beginning of the Great Peace

• Lark, son of Melina, is born

• Binni, Rety's mother, is born

• Melina, with Lark, come to Dolo Dam and marry Nelo the Papermaker

• Sara, daughter of Melina and Nelo, is born

• Dwer, son of Melina and Nelo, is born

• Rety, daughter of Binni, is born

• Joshu, Sara's lover in Biblos, dies

• Melina dies

• The Rothen come to Jijo

Created: 1999-03-08
Timeline (Jijo Years) created: 1999-06-07
Great modification: 2000-06-20