On September 14, 2026, the Moon was in the new phase, showing 14% visibility. The complete calendar of lunar phases for that month was released by the National Institute of Meteorology (Inmet).
The phases for September 2026 began on the 4th with the Waning Moon at 04:52 AM Brasília time. Subsequently, the New Moon occurred on Friday the 11th at 00:27 AM. The Waxing Moon was observed starting from 17:44 PM on the 18th, culminating in the Full Moon on the 26th at 13:50 PM.
A lunar cycle, also known as lunation, refers to the time interval between two new moons and has an average duration of 29.5 days. During this period, the Moon passes through the four main phases—new, waxing, full, and waning—with each phase lasting approximately seven days.
In addition to these main phases, there are so-called 'interphases': the first quarter and the gibbous crescent (located between the new and full phases), and the gibbous waning and the last quarter (located between the full and waning phases).
Details of the Lunar Phases
During the New phase, the satellite is located between the Earth and the Sun. This results in only the side illuminated towards the Sun, while the dark side faces us, making the Moon invisible in the night sky. This phase signals the beginning of a new lunar cycle and is linked to renewal and new opportunities.
After the New Moon, the Waxing phase begins. Slowly, a small illuminated band starts to appear in the sky, progressively increasing each night. Initially, only a thin arc of light is observed, but as the days advance, the illuminated area grows until half of the Moon is visible, a moment called First Quarter. This stage symbolizes development, growth, and the building of new paths.
In the Full Moon phase, the Earth is positioned between the Sun and the Moon. This configuration allows the entire lunar face facing us to receive complete illumination, making it fully visible and bright in the firmament. This is the period of maximum luminous intensity, occurring when the Moon rises on the horizon simultaneously with sunset. The Full Moon is associated with fullness, the peak of processes, and energy at its highest point.
After the Full Moon, the lunar luminosity begins to gradually decline. Each night, the illuminated portion of the surface decreases. When half of it is visible, the Last Quarter occurs, which is the opposite of the First Quarter. The Moon continues to lose brightness until it returns to the New Moon, thus restarting the cycle. The Waning phase represents reflection, closure, and preparation for subsequent beginnings.
On the given day, the Moon was in the New phase.



