The moon being close to the horizon means that it's passing through more atmosphere, which tends to make it appear bigger and at times have a glow to it.
The celestial affair takes place on September 13 at 9:32 p.m.in Metro Vancouver. Why, though, is a Friday the 13th Harvest Moon so rare? NASA says the moon will appear full again Saturday night into Sunday morning.
According to the Farmers' Almanac, the last time a full moon split time zones on Friday the 13th was June 2014.
Some years - depending on how close to the autumn equinox the September moon turns full - it is known as the "corn moon" instead of the harvest moon. That's because it's almost at apogee, the Almanac reports.
The moon will also appear about 14% smaller because of its distance from Earth, which led to the September full moon's additional nickname: "Micro Moon", according to the Almanac.
Emi Brady’s deck of Tarot Cards features 78 hand-colored linocuts
What on god's green earth is a Harvest Moon, you ask?
The spring full moon (in the southern hemisphere) is known as a harvest moon in the northern hemisphere, where it is nearly autumn. In fact, if you do, you won't be able to see much else for several minutes because a full moon emits a very bright glare when it's high in the night sky.
Add in that both the number 13 and Fridays are traditionally considered unlucky and some folks might want to stay close to home tomorrow.
Note: Harvest Moon teaser image captured by Jeff Taylor, on October 5, 2017, and uploaded to The Weather Network UGC gallery. But for most people, the difference will not be noticeable.
The moon will reach its apogee at 6:30 a.m. Friday, said Leigh Cummings, president of the Vancouver Centre chapter of the Royal Astronomical Society of Canada. According to Forbes, the best time to view the harvest moon is at nightfall, when it rises. A full moon may also bring an increased risk of injuries.
"Any night over the weekend, after sunset or around sunset, watch for the full moon rising in the east and you will be impressed". A full micro moon doesn't next occur until October 1, 2020.