[LEAPSECS] Bulletin C and all that

[G Ashton]

Brooks Harris mentioned, at approximately Sun 1/25/2015 21:02 UT, a
"Gregorian timescale". I believe that since in Gregory's time there was no
alternative to making the passage of calendar days agree with the day/night
cycle, we must understand "Gregorian timescale" to mean either apparent or
mean solar time (unless an ecumenical council is called and declares
otherwise). Also, I am not at all sure that the Gregorian calendar has
always been used together with the convention that the new day begins at
midnight; I would like to be pointed to a reference that says that, if it
exists.

Gerard Ashton