Imperial Calendar

The Imperial Calendar is the calendar established at the creation of the Third Imperium as a universal calendar reform.

• IC or IY is the dating abbreviation used to indicate this calendar.
• Dates count from the founding of the Imperium, the year “zero ”.
• Dates before zero are negative, dates after are positive.

For example:

• Terra's year 1 is equivalent to -4520.
• Terra discovered jump drive in -2431.
• The Template:Imperium was founded in 0 (Zero).

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Please see the following AAB Library Data articles for more information:
Charted Space Chronology:

• General Chronology
  • Date Conversion
  • Dating Systems
• Imperial Chronology
  • Imperial Calendar
    • Holiday
    • Holiday Year

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Major Race Chronology:

• Aslan Chronology
  • Aslan Calendar
• Droyne Chronology
  • Droyne Calendar
• Hiver Chronology
  • Hiver Calendar
• K'kree Chronology
  • K'kree Calendar
• Solomani Chronology
  • Solomani Calendar
• Vargr Chronology
  • Vargr Calendar
• Vilani Chronology
  • Vilani Calendar
• Zhodani Chronology
  • Zhodani Calendar

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Description (Specifications)

The year is divided into 365 standard days, which are grouped into 52 weeks of seven days each.

• Days are numbered consecutively, beginning with one.
• The first day of the year is a holiday and is not part of any week.

For example:

• The first day (Holiday) of the year 1116 is 001-1116.
• The last day of the year is 365-1116.

Notes: The lengths of days and weeks is a legacy of Terran domination during the Second Imperium or Rule of Man.

Terran Calendar Comparison

By the time of the Third Imperium in 1116, modern Anglic hadn't changed the content of a week, but it had changed the orthography or spellings of the names of the days:

Imperial Calendar vs. Terran Calendar

#. (Card.)	Cardinal	#. (Ord.)	Ordinal	Imperial Day	Terran Day	Notes
1.	One	1st	First	Wonday	Monday	First day
2.	Two	2nd	Second	Tuday	Tuesday	Second day
3.	Three	3rd	Third	Thirday	Wednesday	Third day
4.	Four	4th	Fourth	Forday	Thursday	Fourth day
5.	Five	5th	Fifth	Fiday	Friday	Fifth day
6.	Six	6th	Sixth	Sixday	Saturday	Sixth day
7.	Seven	7th	Seventh	Senday	Sunday	Seventh day

Calendar Abbreviations by Race & Polity

No information yet available.

• FI or ZS = (First Imperium)
• SI or RoM = (Second Imperium)
• TI = (Third Imperium)

History & Background (Dossier)

The calendar of the Third Imperium bears the legacy of the Terran Confederation and the Rule of Man (Second Imperium) with the sensibilities, pragmatics, and culture of today's Third Imperium.

Tabular Representation

Holiday

001

Wonday	Tuday	Thirday	Forday	Fiday	Sixday	Senday	Wonday	Tuday	Thirday	Forday	Fiday	Sixday	Senday
002	003	004	005	006	007	008	009	010	011	012	013	014	015
016	017	018	019	020	021	022	023	024	025	026	027	028	029
030	031	032	033	034	035	036	037	038	039	040	041	042	043
044	045	046	047	048	049	050	051	052	053	054	055	056	057
058	059	060	061	062	063	064	065	066	067	068	069	070	071
072	073	074	075	076	077	078	079	080	081	082	083	084	085
086	087	088	089	090	091	092	093	094	095	096	097	098	099
100	101	102	103	104	105	106	107	108	109	110	111	112	113
114	115	116	117	118	119	120	121	122	123	124	125	126	127
128	129	130	131	132	133	134	135	136	137	138	139	140	141
142	143	144	145	146	147	148	149	150	151	152	153	154	155
156	157	158	159	160	161	162	163	164	165	166	167	168	169
170	171	172	173	174	175	176	177	178	179	180	181	182	183
184	185	186	187	188	189	190	191	192	193	194	195	196	197
198	199	200	201	202	203	204	205	206	207	208	209	210	211
212	213	214	215	216	217	218	219	220	221	222	223	224	225
226	227	228	229	230	231	232	233	234	235	236	237	238	239
240	241	242	243	244	245	246	247	248	249	250	251	252	253
254	255	256	257	258	259	260	261	262	263	264	265	266	267
268	269	270	271	272	273	274	275	276	277	278	279	280	281
282	283	284	285	286	287	288	289	290	291	292	293	294	295
296	297	298	299	300	301	302	303	304	305	306	307	308	309
310	311	312	313	314	315	316	317	318	319	320	321	322	323
324	325	326	327	328	329	330	331	332	333	334	335	336	337
338	339	340	341	342	343	344	345	346	347	348	349	350	351
352	353	354	355	356	357	358	359	360	361	362	363	364	365

Totals: 52 weeks (7 days each). 365 days (1 Holiday).

References & Contributors (Sources)

This list of sources was used by the Traveller Wiki Editorial Team and individual contributors to compose this article. Copyrighted material is used under license from Far Future Enterprises or by permission of the author. The page history lists all of the contributions.

• John Harshman, Marc Miller, Loren Wiseman. Library Data (A-M) (Game Designers Workshop, 1981), 32.
• John Harshman, Marc Miller, Loren Wiseman. Library Data (N-Z) (Game Designers Workshop, 1982), 31.
• Marc Miller. The Traveller Book (Game Designers Workshop, 1982), 130,141,154.
• Marc Miller. Forms and Charts (Game Designers Workshop, 1983), 46-47.
• Marc Miller. Imperial Encyclopedia (Game Designers Workshop, 1987), 27.
• Marc Miller. Referee's Companion (Game Designers Workshop, 1988), 42-43.
• Michael Berry, David Burden. Milieu 0 Campaign (Imperium Games, 1996), 92.
• Don Perrin. Starships (Imperium Games, 1996), 4-5.
• EXTERNAL LINK: Calendar article in Freelance Traveller
• Traveller Wiki Editorial Team
• Author & Contributor: MIMIC - Minor Imp of the Ministry of Information and Communication
• Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science