mesiac
Mesiac is a Slovak word with two primary senses. In lowercase, it denotes a calendar month, a period of about 30 days used in the annual Gregorian calendar. In this sense it is a time unit and a unit of measurement in everyday and formal language, as in mentions of a specific month or monthly schedules. The concept of a month derives from historical ties to the Moon’s cycle, and cognate terms exist in other Slavic languages (for example Czech měsíc, Polish miesiąc, Russian mesyats). The length of months in the modern calendar varies between 28 and 31 days, and the term is not tied to a single lunar period.
When capitalized as Mesiac, the word refers to Earth’s Moon, the natural satellite that orbits our planet.
In summary, mesiac can refer to a month in the calendar or to the Moon, depending on