Twelvemonth period refers to a year, and there are various synonyms for this term. For instance, a year can also be referred to as an annum, or a cycle of 12 months. Additionally, it can be regarded as a fiscal year, which is 12 consecutive months used by businesses to calculate financial statements. Another term for twelvemonth period is a calendar year, which begins in January and ends in December. Moreover, a year can also be denoted as a solar year, which is the duration it takes for the Earth to complete one orbit around the sun. All in all, there are numerous ways to describe a twelvemonth period.