Assuming the source table is in Sheet1, cols A and B, data from row2 down,
and the Registration Times are actually just numbers formatted to show the
leading zeros (I don't see any semicolons <g)

In Sheet2,

Put in A1:C1 : Sun, 500, 600

Put in D1:

=SUMPRODUCT((Sheet1!$A$2:$A$100=A1)*(Sheet1!$B$2:$ B$100=B1)*(Sheet1!$B$2:$B
$100<=C1))

For the sample data, D1 will return: 3

Copy D1 down to compute correspondingly for other inputs in A2:C2, A3:C3,
etc

Adapt the ranges to suit ..
--
Rgds
Max
xl 97
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GMT+8, 1° 22' N 103° 45' E
xdemechanik <atyahoo<dotcom
----
"DeeJay30" wrote in message
...
I'm need a formula to count the number of registrations per hour for each
day
of the week.

Example:
A B
Day Registration time
Sun 0530
Sun 0546
Sun 0600
Sun 0702

How many entries are for Sunday and fall between 0500 and 0600?

I've tried a countif function and a sumproduct function to no avail.

Thanks,
Dana