We’ve never seen a total lunar eclipse, but it’ll happen May 15-16, 2022. It happens over several hours. For us in Iowa City, Iowa it starts at around 8:30 PM on May 15, 2022 and ends at around 2:00 AM on May 16, 2022.
You don’t need any special eclipse glasses and you can see it with your bare-naked eyes. A lunar eclipse occurs when the Earth passes between the Sun and Moon and lines up precisely so that it blocks the Sun’s light, which otherwise reflects off the Moon. Find more at the Farmer’s Almanac.
There’s a web site to find out when you can see it where you live.
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Total Lunar Eclipse