MSgt Villanueva at the Tomb of the Unknowns

How did the call become associated with funerals? The earliest official reference to the mandatory use of Taps at military funeral ceremonies is found in the U.S. Army Infantry Drill Regulations for 1891, although it had doubtless been used unofficially long before that time, under its former designation Extinguish Lights.

The first use of Taps at a funeral occurred in 1862 [...]