May 1868

Saturday 09:

The city of Reno, Nevada, is founded.

Saturday 16:

President Andrew Johnson is acquitted during his impeachment trial, by one vote in the United States Senate.

Tuesday 26:

The impeachment trial of President Andrew Johnson ends, with Johnson being found not guilty by one vote.

Saturday 30:

Memorial Day (then known as "Decoration Day") is observed in the United States for the first time (it was proclaimed on May 5 by General John Logan).