binary 24 hour clock isnt accurate

[IFREDBON]

Im not sure if this is me or not but the 24 hour clock isnt accurate
So there 4 bits for hours and 6 for both seconds and minutes
4 bits would equal 15 hours not 24 which would work with a 12 hour clock system not a 24 hour one as a 24 hour one would need 5 bits

Sorry if its extremely random but it kinda bothered me
Also this is running with the fact that this is segmented and not full binary like (hours)(m)(s)
And not (time) its on wiki if i didnt explain it thoroughly

[MM2-0]

There is no 24 hour binary clock. It's always 12 hours.