A penumbral lunar eclipse

Lunar eclipse

A lunar eclipse occurs when the Moon passes behind the Earth so that the Earth blocks the Sun's rays from striking the Moon. This can occur only when the Sun, Earth, and Moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can only occur the night of a...

will take place on October 28, 2042. This event marks the beginning of lunar saros cycle 156, and will be visually inperceptible.

It will be the last of 5 Metonic cycle eclipses occurring every 19 years on October 28th.

Metonic series

This eclipse is the last of four Metonic cycle

Metonic cycle

In astronomy and calendar studies, the Metonic cycle or Enneadecaeteris is a period of very close to 19 years which is remarkable for being very nearly a common multiple of the solar year and the synodic month...

lunar eclipses on the same date, October 28-29, each separated by 19 years: