On September 6, 2026, the Moon was in the waning phase, with 28% visibility. The complete calendar of lunar phases for September 2026 was released by the National Institute of Meteorology (Inmet).
The lunar phases this month began on Friday, the 4th, with the Waning Moon at 04:52 AM Brasília time. Subsequently, the New Moon will occur on the 11th at 00:27 AM. The Waxing Moon will appear on the 18th at 17:44 PM, and the Full Moon will be seen on the 26th at 13:50 PM.
A lunar cycle, also known as a 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,' which include the first quarter and the gibbous waxing (located between the new and full phases), and the gibbous waning and the last quarter (between the full and waning phases).
Details about Lunar Phases
During the New Moon 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 this illuminated area grows until half of the Moon is visible, a moment called First Quarter. This phase symbolizes development, growth, and the building of new paths.
During 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 sky. 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, conclusion, and preparation for subsequent beginnings.