Questions:
I have twelve events every day from 8am to 8pm every hour.
I have two columns in Excel spreadsheet: “date and time” and “description”.
I need to add date and time stams for each cell of “date and time” column in the format
16/11/2011 08:00
So the first twelve cells will look like that:
16/11/2011 08:00
16/11/2011 09:00
16/11/2011 10:00
16/11/2011 11:00
16/11/2011 12:00
16/11/2011 13:00
16/11/2011 14:00
16/11/2011 15:00
16/11/2011 16:00
16/11/2011 17:00
16/11/2011 18:00
16/11/2011 19:00
16/11/2011 20:00
Then the next day shall come:
17/11/2011 08:00
17/11/2011 09:00
17/11/2011 10:00
17/11/2011 11:00
17/11/2011 12:00
17/11/2011 13:00
17/11/2011 14:00
17/11/2011 15:00
17/11/2011 16:00
17/11/2011 17:00
17/11/2011 18:00
17/11/2011 19:00
17/11/2011 20:00
Is there a way I can get the column filled in automatically for several months?
How to&Answers:
Put your first date in cell A1:
16/11/2011 08:00
And in cells A2 and below, add the formula:
=A1+TIME(IF(HOUR(A1)=20,12,1),0,0)
and then drag down your formula till where you need.
[EDIT] Explaining a little bit the formula: in order to keep the formula quite simple, it is rather specific.Meaningly,
- the formula starts at the previous date
A1 + - then, it adds some hours (with the
TIMEfunction) but no minutes nor seconds (0,0)i.e. see the end of the formula - to choose the number of hours to add, it checks wether the previous date hour is
8pm(i.e.HOUR(A1) = 20).- If so, it adds
12hours so that the new date is at8amthe next morning. - If not, it adds only
1hour (next event)
- If so, it adds
WEEKDAY=6) and hour is 8pm (HOUR(A1)=20). If so, it adds two days (just add 2 because date in Excel are stored as serial number and unit is a day). =A1+TIME(IF(HOUR(A1)=20,12,1),0,0) + IF(AND(HOUR(A1)=20,WEEKDAY(A1)=6),2,0)
Tags: date, excelexcel, time
