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?
It takes around 29.5 days to move through the eight Moon phases.
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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.
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
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.