The answer to this is deceptively simple. Since at any given moment half of the Earth's surface is pointed to the Sun, therefore experiencing daytime, that means any event that happens can be happening during the daytime. read more
Lunar eclipse occurs when earth comes between the moon and this time earth's shadow falls on the moon.so that for a lunar eclipse there needs a full moon. When one side of the earth is in day time,the other side will be in night . read more
During a total lunar eclipse, Earth's umbra completely covers the Moon. Sun, Earth, and Moon Aligned. For a lunar eclipse to occur, the Sun, Earth, and Moon must be roughly aligned in a line. Otherwise, the Earth cannot cast a shadow on the Moon's surface and an eclipse cannot take place. read more
Practically speaking you cannot see a lunar eclipse during the day. The earth is exactly between the sun and the moon, so at any point on the earth you can only see one of the two - either you can see the moon (and thus the lunar eclipse) or you can see the sun (and it's daytime). read more