287

This article is about the year 287. For the number, see 287 (number). For the processor, see Intel 80287.

Year 287 (CCLXXXVII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Diocletian and Maximian (or, less frequently, year 1040 Ab urbe condita). The denomination 287 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Millennium:	1st millennium
Centuries:	2nd century 3rd century 4th century
Decades:	260s 270s 280s 290s 300s
Years:	284 285 286 287 288 289 290

287 in various calendars

Gregorian calendar	287 CCLXXXVII
Ab urbe condita	1040
Assyrian calendar	5037
Balinese saka calendar	208–209
Bengali calendar	−306
Berber calendar	1237
Buddhist calendar	831
Burmese calendar	−351
Byzantine calendar	5795–5796
Chinese calendar	丙午年 (Fire Horse) 2984 or 2777     — to — 丁未年 (Fire Goat) 2985 or 2778
Coptic calendar	3–4
Discordian calendar	1453
Ethiopian calendar	279–280
Hebrew calendar	4047–4048
Hindu calendars
- Vikram Samvat	343–344
- Shaka Samvat	208–209
- Kali Yuga	3387–3388
Holocene calendar	10287
Iranian calendar	335 BP – 334 BP
Islamic calendar	345 BH – 344 BH
Javanese calendar	167–168
Julian calendar	287 CCLXXXVII
Korean calendar	2620
Minguo calendar	1625 before ROC 民前1625年
Nanakshahi calendar	−1181
Seleucid era	598/599 AG
Thai solar calendar	829–830
Tibetan calendar	阳火马年 (male Fire-Horse) 413 or 32 or −740     — to — 阴火羊年 (female Fire-Goat) 414 or 33 or −739

Events

By place

Roman Empire

• On the same day that he is made consul, Maximian launches a campaign against an invasion of Gaul by the Alemanni. After defeating this invasion, he then invades Alemannia itself, entering across the Upper Rhine and returning to Roman territory via the Upper Danube.
• Around this time, the future emperor Constantius defeats and captures a Germanic king, the latter having prepared an ambush against the Romans.
• Diocletian signs a peace treaty with King Bahram II of Persia, and installs the pro-Roman Arsacid Tiridates III as king over the western portion of Armenia.
• Diocletian re-organizes the Mesopotamian frontier, and fortifies various locations including the city of Circesium (modern Busayrah) on the Euphrates. Around this time, he begins the construction of the Strata Diocletiana. Throughout his reign, similar fortification efforts are conducted on the other frontiers as well, with fortifications constructed or restored behind, on and beyond the borders. Conscription and the number of legions increase, although the legions themselves are reformed into smaller and more flexible units. At some point in time, Diocletian may have also established the late Roman military system of Comitatenses (field army units) and Limitanei (border units), but some scholars date this development to the reign of Constantine I (r. 306–337).
• September – The first Indiction begins.

Deaths

• Justa and Rufina, Christian martyrs
• Maurice (or Mauritius), Christian martyr
• Quentin, Christian missionary and martyr
• Valerius and Rufinus, Christian martyrs
• Victoricus, Fuscian, and Gentian, Christian martyrs