Addendum: This crop formation might actually invoke both solar eclipses for this year - October 23 still to come, and the previous solar eclipse on April 29. The reason is that while it clearly shows the partial eclipse as mentioned, you'll note that the edge of the "partial eclipse" made by the off-center circle does not line up with the edge of its containing circle. Instead, there is a clear, yet small, distance at the edge, forming a "rim." Interestingly, such a rim-edge is exactly what happens during an annular eclipse, when (per Wiki) "...the Moon's apparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring)."

So in this crop formation we have the portrayal of each of the two specific kinds of solar eclipses for this year, annular and partial, as well as an alignment showing the lineup for a total lunar eclipse (of which there were also two, each associated with a solar eclipse). Therefore this formation might also be indicating the time period between April 15 (lunar) and 29 (solar), and October 8 (lunar) and 23 (solar).

Of course, since the formation has appeared now, it is obviously emphasizing the October events. Nevertheless, the idea that something important has taken place between these two April and two October eclipse lunar-solar groupings is fascinating to consider. Even more fascinating, I think, is that the Circlemakers seem excited about it, too.