intercalary
61Mercedonius — Mercedonius, also known as Intercalaris, was the intercalary month added in leap years of the Roman calendar. The resulting year was either 377 or 378 days long. The exact mechanism by which this was done is not clearly specified in ancient… …
62Golden hat — Golden hats (or Gold hats) (German: Goldhüte , singular: Goldhut ) are a very specific and rare type of archaeological artefact from Bronze Age Central Europe. So far, four such objects ( cone shaped gold hats of the Schifferstadt type ) are… …
63Berlin Gold Hat — The Berlin Gold Hat or Berlin Golden Hat () is a Late Bronze Age artefact made of thin gold leaf. It served as the external covering on a long conical brimmed headdress, probably of an organic material. The Berlin Gold Hat is the best preserved… …
64Nisan-years — is an ancient calendar system used around Mesopotamia. Its area of usage covers Elam, Persia, Media, Syria and Israel/Judea. Its beginning was from prehistorical era. Ever since Mesopotamia had historical writings, even before the Old Babylonian… …
65Islamic calendar — Arabic calendar redirects here. For the Gregorian calendar in Arabic, see Arabic names of calendar months. This …
66History of calendars — The history of calendars spans several thousand years. In many early civilizations, calendar systems were developed. For example, in Sumer, the birthplace of the modern sexagesimal system, there were 12 months of 29 or 30 days apiece, much like… …
67Calendar reform — A calendar reform is any significant revision of a calendar system. The term sometimes is used instead for a proposal to switch to a different calendar.Most calendars have several rules which could be altered by reform: * Grouping of days of the… …
68Babylonian calendar — Contents 1 Months 2 Days 3 See also 4 References …
69Intercalation — is the insertion of a leap day, week or month into some calendar years to make the calendar follow the seasons or moon phases. Lunisolar calendars may require intercalations of both days and months. The solar year does not have a whole number of… …
70Biblical and Talmudic units of measurement — Biblical and Talmudic units of measurement, such as the Omer, used primarily by ancient Israelites, appear frequently within the Hebrew Bible as well as in later Judaic scripture, such as the Mishnah and Talmud. These units of measurement are… …
