Births
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| Millennium: | 1st millennium BC |
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| Centuries: | |
| Decades: | |
| Years: |
| 645 BC by topic |
| Politics |
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| Categories |
| Gregorian calendar | 645 BC DCXLIV BC |
| Ab urbe condita | 109 |
| Ancient Egypt era | XXVI dynasty, 20 |
| - Pharaoh | Psamtik I, 20 |
| Ancient Greek era | 33rd Olympiad, year 4 |
| Assyrian calendar | 4106 |
| Balinese saka calendar | N/A |
| Bengali calendar | −1237 |
| Berber calendar | 306 |
| Buddhist calendar | −100 |
| Burmese calendar | −1282 |
| Byzantine calendar | 4864–4865 |
| Chinese calendar | 乙亥年 (Wood Pig) 2052 or 1992 — to — 丙子年 (Fire Rat) 2053 or 1993 |
| Coptic calendar | −928 – −927 |
| Discordian calendar | 522 |
| Ethiopian calendar | −652 – −651 |
| Hebrew calendar | 3116–3117 |
| Hindu calendars | |
| - Vikram Samvat | −588 – −587 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2456–2457 |
| Holocene calendar | 9356 |
| Iranian calendar | 1266 BP – 1265 BP |
| Islamic calendar | 1305 BH – 1304 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 1689 |
| Minguo calendar | 2556 before ROC 民前2556年 |
| Nanakshahi calendar | −2112 |
| Thai solar calendar | −102 – −101 |
| Tibetan calendar | 阴木猪年 (female Wood-Pig) −518 or −899 or −1671 — to — 阳火鼠年 (male Fire-Rat) −517 or −898 or −1670 |
The year 645 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 109 Ab urbe condita . The denomination 645 BC 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.
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The Julian calendar, proposed by Julius Caesar in 708 Ab urbe condita (AUC) (46 BC), was a reform of the Roman calendar. It took effect on 1 January 709 AUC (45 BC), by edict. It was designed with the aid of Greek mathematicians and Greek astronomers such as Sosigenes of Alexandria.
The Roman calendar was the calendar used by the Roman kingdom and republic. The term often includes the Julian calendar established by the reforms of the dictator Julius Caesar and emperor Augustus in the late 1st century BC and sometimes includes any system dated by inclusive counting towards months' kalends, nones, and ides in the Roman manner. The term usually excludes the Alexandrian calendar of Roman Egypt, which continued the unique months of that land's former calendar; the Byzantine calendar of the later Roman Empire, which usually dated the Roman months in the simple count of the ancient Greek calendars; and the Gregorian calendar, which refined the Julian system to bring it into still closer alignment with the tropical year.
A week is a time unit equal to seven days. It is the standard time period used for cycles of rest days in most parts of the world, mostly alongside—although not strictly part of—the Gregorian calendar.
AD 14 (XIV) was a common year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Pompeius and Appuleius. The denomination AD 14 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.
AD 25 (XXV) was a common year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Lentulus and Agrippa. The denomination AD 25 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.
Year 106 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Caepio and Serranus. The denomination 106 BC 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.
An epoch, for the purposes of chronology and periodization, is an instant in time chosen as the origin of a particular calendar era. The "epoch" serves as a reference point from which time is measured.
Year 7 BC was a common year starting on Saturday or Sunday of the Julian calendar and a common year starting on Thursday of the Proleptic Julian calendar. In the Roman world, it was known as the Year of the Consulship of Nero and Piso. The denomination 7 BC 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.
Year 8 BC was either a common year starting on Friday or Saturday or a leap year starting on Thursday of the Julian calendar and a common year starting on Wednesday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Censorinus and Gaius Asinius. The denomination 8 BC 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.
This article concerns the period 649 BC – 640 BC.
Year 86 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Cinna and Marius/Flaccus. The denomination 86 BC 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.
Year 82 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Marius and Carbo. The denomination 82 BC 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.
Year 110 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Rufus and Albinus. The denomination 110 BC 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.
Year 109 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Numidicus and Silanus. The denomination 109 BC 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.
140 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Sapiens and Caepio and the First Year of Jianyuan. The denomination 140 BC 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.
Year 200 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Maximus and Cotta. The denomination 200 BC 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.
The Japanese era name, also known as gengō (元号), is the first of the two elements that identify years in the Japanese era calendar scheme. The second element is a number which indicates the year number within the era, followed by the literal "nen (年)" meaning "year".
A calendar era is the period of time elapsed since one epoch of a calendar and, if it exists, before the next one. For example, the Gregorian calendar numbers its years in the Western Christian era.
A regnal year is a year of the reign of a sovereign, from the Latin regnum meaning kingdom, rule. Regnal years considered the date as an ordinal, not a cardinal number. For example, a monarch could have a first year of rule, a second year of rule, a third year of rule, and so on, but not a zeroth year of rule.
The April Lyrids are a meteor shower lasting from April 16 to April 26 each year. The radiant of the meteor shower is located in the constellation Lyra, near its brightest star, Vega. The peak of the shower is typically around April 22 each year.
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