(Meredith) - Friday the 13th will be even spookier this week when a full moon appears in the sky.
The so-called "Harvest Moon" will reach its full phase the night of Friday, Sept. 13 in the Central, Mountain and Pacific time zones.
Those who live in the Eastern Time Zone can catch a glimpse of the moon just after midnight at 12:33 am on Saturday, Sept. 14, according to NASA.
A full moon on Friday the 13th is rare since it happens once every 20 years on average, according to the Farmer's Almanac. The last occurrence was on Oct. 13, 2000. After this weekend, the next one is expected to appear on Aug. 13, 2049.
The upcoming "Harvest Moon" has also been referred to as a "Micro Moon" because it will appear about 14 percent smaller in the sky. This is because the moon will be at apogee, the point in its orbit when it's furthest away from Earth.
Normally, the moon rises an average of 50 minutes later each day. But in the days leading up to the "Harvest Moon," that interval will shorten to about 30 minutes. During this time, more light will be available to farmers after sunset.