The clock, which is blue, has sixteen hours instead of twelve. Fans have pointed out that this interesting detail is likely due to the fact that the world of Stray is largely populated by robots. The robots' bit memory can, in theory, house sixteen numbers, which means a sixteen value clock is logical to a cybernetic society.
Computers count using binary bits and exponentiation. Below are various representations:
1111 = 15
0001 = 1
0101 = 5
1100 = 12
0000 = 0
"Where is 16?!" you ask? Zero represents 16.
It seems like 4 bits of memory are allocated to storing the hour. If an AM/PM designation is needed then add one bit to the storage mechanism;
0 = AM and
1 = PM or whatever your robotic heart desires.
I don't know the answer to this but if Stray actually has 32 hours in a day then the hour would require 5 bits of storage:
11111 = 31