What massive lunar event happened in 2016 or 2016?

The massive lunar event most likely refers to the supermoon/“Beaver Moon” lunar eclipse season in 2016, but the wording is a bit unclear. If you meant a truly standout lunar moment that year, the Great American Eclipse was solar, not lunar; for the Moon, the biggest widely noted event was the supermoon during the November 2016 period.

Likely interpretation

• Supermoon: the Moon appears larger and brighter because it is near perigee.
• Lunar eclipse: a shadow event where Earth moves between the Sun and Moon.
• “Massive lunar event” in 2016: people often use that phrase loosely for a supermoon or eclipse, not a formal event name.

What happened in 2016

A lunar event in 2016 that drew attention was a lunar eclipse reported around late July, which caused public concern in some places. Another space- related 2016 item tied to “lunar” in headlines was the end of a game’s Lunar Festival 2016 event, but that is not an astronomy event.

Best match

If you’re asking about astronomy, the best match is a supermoon or lunar eclipse in 2016 rather than a single uniquely named “massive lunar event”.

TL;DR

The phrase most likely points to a 2016 supermoon or lunar eclipse , with the clearest documented lunar-news example being the July 2016 lunar eclipse.