Fingpilot , "Last Post" was originally a signal for the end of the day, started by British troops in Holland, where they have tap toe literally , close the (water- or maybe beer)tap, but not linked to "taps"
only later did it become a memorial/burial tune...
in my home town it's played every day under the Menin Gate, at 20h00, year in year out , sine 1928, only stopped briefly during WW2
http://www.lastpost.be