The First Quarter Moon Is A Half Moon - Time And Date

Your January 2026 Moon guide

Skywatching tips for January

Dec 19: Comet 3I/ATLAS closest to Earth

Next First Quarter Moon

28 Tháng mười hai 2025 p. 2:09 SA

Previous First Quarter Moon

28 Tháng mười một 2025 p. 1:58 CH

Times for the First Quarter Moon vary by time zone. Times and dates are based on the local time in Ho Chi Minh. Change location

Half the Moon Is Lit Up

The First Quarter Moon is also called a Half Moon because the Sun’s rays illuminate about 50% of the Moon’s surface seen from Earth.

Lunar Eclipse Live Stream

We are streaming the total eclipse of tonight’s Full Moon. See it LIVE here!

Half of the Moon’s surface is always illuminated by direct sunlight, except during lunar eclipses when Earth casts its shadow on the Moon. Just how much of that light we can see from Earth varies every day, and we call this a Moon phase.

Moon phase tonight

Half Moon Visible During the Day

The Moon is the only astronomical object you can easily see in the day blue sky apart from the Sun. The First Quarter Moon rises around midday and sets around midnight. This is the opposite of a Third Quarter Moon, which rises in the middle of the night and sets in the middle of the day.

The Moon: Our natural satellite

Soon after First Quarter, a Golden Sight

About two days after the First Quarter Moon, a delicate visual effect known as the Golden Handle or Jewelled Scimitar occurs. As sunlight creeps across the Moon’s face, it lights up the peaks of the Montes Jura (a mountain range) above the still-dark Sinus Iridum (Bay of Rainbows), and a curved “handle” appears on the terminator, the line separating the dark and the lit-up side of the Moon.

Advertising

Second Primary Moon Phase

In western culture, we divide the lunar month into four primary and four intermediate Moon phases.

First Quarter Moon is the second primary Moon phase when the Moon has reached the first quarter of its orbit around Earth, hence the name.

A Primary Phase Is an Exact Time

The first primary Moon phase is New Moon, while the third is the Full Moon, and the last is called Third Quarter Moon.

The primary Moon phases occur at a specific moment in time, and the intermediate Moon phases are the time between the primary phases. These are the Waxing Crescent Moon, the Waxing Gibbous Moon, the Waning Gibbous Moon, and the Waning Crescent Moon.

Same Phase Looks Different

Moon phases are the same all over the world. The same percentage and area of the Moon are illuminated no matter where on Earth you are. However, the Moon is rotated in different ways depending on the time, the date, your location, and the Moon’s position in the sky. Therefore, the illuminated part can appear on the left, the right, the top, or the bottom.

Is the Moon upside-down in the other hemisphere?

Opposite Sides in Opposite Hemispheres

At the First Quarter in the Northern Hemisphere, the lit up half of the Moon appears on the right, while in the Southern Hemisphere it appears on the left. Near the equator, the Moon is oriented so that the upper part is bright after moonrise, and the lower part is bright before moonset.

Latitude and longitude

First Quarter Moon in Calendars

The symbol for First Quarter Moon in modern calendars is a circle split down the middle with the right side white and the left side black.

The other primary Moon phase symbols in calendars are:= New Moon, = Full Moon, = Third Quarter

Calendar with Moon phases

The Moon illustration on our Moon phase pages changes as time passes and indicates more accurately, although not perfectly, the orientation of the illuminated part of the Moon.

Sleep, crime, and menstruation: how Moon phases affect humans

Affects the Tides

The ocean tides on Earth are mostly generated by the Moon’s gravitational pull. At the First and Third Quarter, the Moon and Sun pull in different directions, producing the smallest difference between high and low tide, known as neaps or neap tide.

The largest tidal range is around Full Moon and New Moon. During these Moon phases, the Moon and the Sun’s gravitational forces combine to pull the ocean’s water in the same direction. These tides are known as spring tides or king tides.

Topics: Moon, Moon Phases