PUZZLE 127 It Adds Up to Nothing

The professor has set a tricky problem
?3?95? plus 1 apparently makes zero.
Can you figure out which numbers go in the ghree blank spaces?
Touch each answer box to input the numbers.

Hint 1

The numbers aer not representing a six-digit figure.
They are showing a number that can sometimes be seen about your person.

Hint 2

It's easier to work this one out if you split the digits up into groups of two.

Hint 3

The numbers are representing time.

Super Hint

Zero would be 00:00:00.
So what would one second before that look like?

Answer for 'It Adds Up to Nothing'

The answer is '2, 5 and 9'.