This is a watchface for a Pebble Smartwatch. It only works on the original Pebble and Pebble Steel. It does not work on the Pebble Time.
It shows the time as if somebody answers the question: "What is the time?" Nobody says "six zero zero". They say "six o'clock". People don't say "six forty six", but "a quarter to seven". I never say "three twent eight". I say "nearly half past eight".