I have a spreadsheet with the following data:

Column A Column B
05:00 Item A
Item B
Item C
07:00 Item A
Item B
09:00 Item B
Item C

Each item corresponds with the time in the same block. What I want to
accomplish is have the time move down until it comes to the next
time. Shown below:

05:00 Item A
05:00 Item B
05:00 Item C
07:00 Item A
07:00 Item B
09:00 Item B
09:00 Item C

So it copies the time down until it comes to the next, non-empty
cell. What I'll then do is count the number of item a entries at
specific times (morning vs afternoon) and so on.