Adding date when times pass midnight

I have a set of times in chronological order with a start date for the first time. I need to have dates on each stage but I can't default this to the start date as often the times pass midnight so the date needs to be the next day if the time is less than the previous stage.

Any help much appreciated.

Put this in C7:

=INT(B7)+C2+(C2<B2)

then copy across.

Hope this helps.

Pete

Many thanks Pete. The calculations I was doing were unnecessarily more complicated and didn't work! Yours did. Thanks a lot.