The various historical periods throughout the existence of Aurbis are differentiated into various 'eras', each of arbitrary length according to the conclusions of significant political occurrences such as the end of a monarchic dynasty (see the Second Era and the Fourth Era) or the conquering and unification of societies into a single governmental sovereignty (see the First Era and Third Era).
The five past eras as well as the current can be separated into prehistoric and modern eras according to when civilizations began to record and document significant events. Exact dates of events that occurred in the Dawn Era and the Merethic Era cannot be known as such information does not exist due partly to a lack of record keeping by the then extant societies and mostly due to the partial absence of established chronological systems (calendars, periods, etc.). Thus, such eras are prehistoric and the occurrence of events during these eras can only be approximated with various degrees of uncertainty. Events occurring in the eras following the Merethic Era, however, often have exact dates or years due to the prevalence of record keeping and the development of a quasi-universal system of chronology. Thus, such eras are modern.
- Dawn Era – The Dawn Era begins with the existence of Anu and Padomay. Aurbis begins to exist during the first period of discernible time. Later follow Mundus and Oblivion as separate realms from Aetherius. Auriel and Lorkhan war against each other during this time, after the Aedra are tricked by the latter into creating Mundus. The era ends with the condemnation of Lorkhan for the creation of Mundus.
- Merethic Era – Linear time can finally be discerned, and the Merethic Era begins in ME 2500 with the construction of the Adamantine Tower following the defeat of Lorkhan and the subsequent creation of Red Mountain. The Elven races thrive during this time, as the Aldmer explore northern Tamriel and the Ayleids establish a sprawling empire in the heart of the continent. The era finally ends in ME 1, with the founding of the Camoran Dynasty.
- First Era – The First Era begins with the founding of the Camoran Dynasty. Cultural, military, and political dominance in Tamriel begins to shift from Mer to Men following the rise of the Cyrodilic Empire from the Alessian Rebellion over the Camoran Dynasty in Valenwood. The Alessian Empire would then later be reorganized into the Reman Empire under the Reman Dynasty. After 2920 years from its start, the era ends with the assassination and end of the Reman Dynasty.
- Second Era – Political and military stability in Tamriel begins to dissipate, leading to the formation of several multi-provincial alliances and the absence of legitimate rulers of the Cyrodilic Empire. This causes the Interregnum, culminating in the Alliance War and paving the way for the Planemeld, the invasion of Tamriel by Molag Bal from Oblivion. In the midst of the battles raging during the Alliance War, the Court of Bedlam would carry out the Daedric War in Vvardenfell, Clockwork City, and the Summerset Isles against Vivec, Sotha Sil], and the Psijic Order to reshape Tamriel in their image. By the latter stage of the Second Era, Tiber Septim would crusade the provinces of Tamriel and unite them under the Septim Empire. The Second Era begins with the assassination of the last members of the Reman Dynasty and ends 896 years later, with the unification of Tamriel under the reorganized Septim Empire led by the newly founded Septim Dynasty].
- Third Era – The Third Era begins with the founding of the Septim Empire under the Septim Dynasty. The centralized authority of Tamriel under the Septim Empire rises in power, followed by populist revolts against Imperial authority, especially in Morrowind and presumably Black Marsh by the An-Xileel by the latter stage of the period. Events such as the Imperial Simulacrum, The Warp in the West, the rise of Dagoth Ur and the Nerevarine, the fall and eventual reorganization of the Tribunal Temple, the establishment of Raven Rock on the island of Solstheim, the Oblivion Crisis, the final Greymarch in the Shivering Isles, and the return of Umaril would all occur during the latter period of the Third Era. The Third Empire's eventual loss of power and regional control would eventually lead to the assassination of Uriel Septim VII] and his heirs by the Mythic Dawn, and the subsequent invasion of Tamriel by Mehrunes Dagon. The end of the Septim Dynasty the Oblivion Crisis in 3E 433 marks the beginning of the Fourth Era.
- Fourth Era] – A resurgence of military and political power in the Elven races centralized in the Third Aldmeri Dominion pressures the struggling and largely leaderless Septim Empire. The Mede Dynasty takes over the Septim Empire and later enters into the Great War against the Third Aldmeri Dominion, resulting in the temporary weakening of the Dominion, crippling of the Empire, and signing of the White-Gold Concordat treaty. That treaty, which outlaws the worship of Talos, would later cause the Skyrim Civil War which would coincide with the Dragon Crisis, the attempted fulfillment of the Tyranny of the Sun prophecy, and the return of Miraa] on Solstheim.