jun 28th also falls at [:23] on the clock
:23 is exactly opposite of :53 (exactly [30])
think 53-47 post
:53
12th hour = 0th hour, correct
this is assuming the "11th hour" = 2300
if 2300 is the 11th hour of 12 hours, then the 11th hour would end at 2500
but i understand your math as well, you started going 1/12th instead of 2/24ths.