Roman calendar ancient Greek calendars; and the Gregorian calendar, which refined the Julian system to bring it into still closer alignment with the solar year and is the basis of the current international standard. Roman dates were counted inclusively forward to the next of three principal days: the first of the month (the kalends), a day less than the middle of the month (the ides), and eight days—nine, counting inclusively—before this (the nones). The original calendar consisted of 10 months beginning in spring with March; winter was left as an unassigned span of days. These months ran for 38 nundinal cycles, each
Adoption of the Gregorian calendar government in 1912 as the start rather than the regnal year of an emperor. The adopted calendar in both mainland China and Taiwan are called the "Public Calendar" (), or "New Calendar" (). Months in Gregorian calendar in Chinese are rarely named, instead they are usually numbered. For instance, Gregorian calendar December in China are usually written as month 12. On the other hand, in Chinese calendar, the 11th month and 12th month are usually nicknamed. Orally, people are accustomed to call the date in the month as "No. "dd"", for example, the Spring Festival of this year (2017) is