Full Harvest Moon 2021: the Autumn Full Moon

Mark your calendars for the Full Harvest Moon 2021, the full moon closest to the Autumn Equinox each year.

Picture of the Full Harvest Moon 2021, the September Full Moon

Why the October Full Moon is called the Full Harvest Moon

The Fall Full Moon’s name is inspired by nature and agriculture. And this particular full moon name sometimes switches between September and October. It depends on which of the two full moons is closer to the Fall Equinox.

In years where the September Full Moon is closer to the Fall Equinox, the October Full Moon’s name is the Full Hunter’s Moon instead.

And in October when the full moon is closer to the Equinox, the September Full Moon is called the Full Corn Moon.

When is the Full Harvest Moon in 2021?

The Autumn Equinox will occur on September 22, 2021 15:21 EST. The October Full Moon is 28 days later. The September Full Moon is on the calendar for about 2 days before the equinox.

The 2021 Full Harvest Moon will be on Monday, September 20, 2021 19:55 EST based on the data provided by NASA.

In September 2021 the full moon will be called the Full Harvest Moon because it’s closer to the Fall Equinox than the October Full Moon. Otherwise, the September 2021 full moon would have been called the Full Corn Moon. For 2021, the October Full Moon will be called the Full Hunter’s Moon.

Related: Full Moon Calendar for 2021

Future Full Harvest Moons for 2021 to 2025

Here is a list of the Full Moons that will be considered the Harvest Moon for 2021 to 2025.

For the five full moons in the future, the Harvest Moon will generally be the September full moon based on how the calendar aligns with the fall equinox.

Depending on where you are located sometimes the full moon will shift dates between timezones.

YearDay of the weekFuture Harvest Moons
2021MondaySeptember 20, 2021 19:55 EST
2022SaturdaySeptember 10, 2022 05:59 EST
2023FridaySeptember 29, 2023 05:57 EST
2024TuesdaySeptember 17, 2024  22:34 EST
2025MondayOctober 6, 2025 22:48 EST 

Past Full Harvest Moons 2015 to 2020

And here is a list of the five September full moons that occurred from 2015 to 2020.

Looking at the past Harvest Moons, they also frequently occurred in September.

Depending on where you are located sometimes the full moon will shift dates between timezones.

YearDay of the weekPast October Full Moons
2015SundaySeptember 27, 2015 22:50 EST
2016FridaySeptember 16, 2017 15:05 EST
2017ThursdayOctober 5, 2017 14:40 EST
2018MondaySeptember 24, 2018 22:53 EST
2019SaturdaySeptember 14, 2019 00:33 EST
2020ThursdayOctober 1, 2020 17:05 EST

Additional Full Moon Calendars

And if you’re looking for when the full moon occurs for the rest of the year, check out these future full moon calendars.