Spanish Era

The Spanish era (), sometimes called the era of Caesar, was a calendar era (year numbering system) commonly used in the states of the Iberian Peninsula from the 5th century until the 15th, when it was phased out in favour of the ''Anno Domini'' (AD) system. The epoch (start date) of the Spanish era was 1 January 38 BC. To convert an ''Anno Domini'' date to the corresponding year in the Spanish era, add 38 to the ''Anno Domini'' year, such that Era 941 would be equivalent to AD 903. A date given in the Spanish era always uses the word ''era'' followed by a feminine ordinal number (when written out instead of given in Roman numerals). This contrasts with the AD system that uses the masculine ''anno'' (year): i.e., ''era millesima octava'' versus ''anno millesimo octavo''.

The reasons behind the choice of 38 BC are unknown. It has been suggested that it may result from an Easter table that began with that year (rather than the Incarnation). Isidore of Seville in his ''Etymologiae'' (early 7th century) included an explanation of the meaning of Latin '' aera'', plural of '' aes'' (bronze, brass, copper). "An era", writes Isidore, "according to the sequence of the years was set up by Caesar Augustus when he first levied a general tax and mapped the Roman world .e., in 38 BC It was called ''aera'' because the whole world pledged itself to deliver copper to the state." In reality, the meaning of "period of time" for ''aera'' comes from the use of bronze counters in calculations.

The Spanish era was used throughout the Visigothic Kingdom, which covered all of the Iberian Peninsula and the region of Septimania. It was even used in parts of North Africa. It continued in use in these regions but gradually fell away before the end of the Middle Ages. Official usage of the era ceased in different parts of the peninsula at different times: Catalonia dropped the era (as well as the French king's regnal year) in AD 1180, Aragon in 1349/1350, Valencia in 1358, Castile in 1382/1383, Portugal in 1420/1422 and Navarre in the early 15th century. While the year officially began on 1 January under the Spanish era, that was changed to 25 December when the ''Anno Domini'' system was adopted (while the Church used 11 January).

In al-Andalus under Muslim rule, the Spanish era was called the ''taʾrīkh al-ṣufr''. This has been interpreted by Ignác Goldziher as "European era", from '' taʾrīkh'' (date, era, annals) and ''aṣfar'' (yellow, pale, red), a word which came to be applied to Greeks, then Romans and by the Middle Ages to Europeans in general, the ''Banuʾl-Aṣfar'' ("sons of the yellow one"). Alternatively, Giorgio Levi Della Vida interprets it as "Bronze Era", with ''ṣufr'' corresponding to Latin '' aera'', i.e. "bronze." This derivation is supported by a legend recorded in the 12th-century '' Chronica Gothorum Pseudoisidoriana'' and interpolated in the Arabic translation of Orosius' ''Historiae adversus paganos''. According to this legend, Augustus in 38 BC taxed the whole empire in bronze or copper coin and melted it down to make plates with which he covered the banks of the Tiber.

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{{DEFAULTSORT:Spanish Era
Calendar eras
Chronology
Era
Medieval history of Portugal
38 BC
14th-century disestablishments
15th-century disestablishments
Portugal in the Roman era
Era
5th-century establishments in the Roman Empire