Excel日期时间公式

Question

I need to fill in dates corresponding to time. I just need something that increments the date when the time changes from 23 to 0. Here is what my sheet looks like:

    5/1/2017    23:00
    5/1/2017    23:00
    5/1/2017    23:00
       ?        0:00
       ?        0:00
       ?        0:00

I've tried these with different formats for the time column:

IF(AND(B4=0,B3=23),A3+1,A3)

IF(AND(B4="1/0/1900 12:00:00 AM",B3="1/0/1900 11:00:00 PM"),A3+1,A3)

IF(AND(B4="12:00:00 AM",B3="11:00:00 PM"),A3+1,A3)

Answer 1

Your first formula looks correct but you can see where it's wrong if you type =B3=23 into a cell (it's FALSE ). Instead, try B3=23/24 : =IF(AND(B4=0,B3=23/24),A3+1,A3) .

Answer 2

        A           B
1    5/1/2017   11:00:00 PM
2    XXX        12:00:00 AM

Where XXX is = IF(ABS(B1-23/24)<0.001,IF(ABS(B2-24/24)<0.001,A1+1,A1),A1)

what we do here is a nested if statement, basically saying if A and B

where A is "time in cell above is near 11 pm"

and B is "time in cell is near zero"

the way date/times work in excel is that the fractional portion corresponds to time after midnight. So 1/24 ~ .041667 is an hour past midnight, and 23/24 is 11 pm