Creating Calculations on Dates

I am setting up a worksheet that will list tasks, their start dates, durations and I am using the Workday function to calculate the end date for the task. I am then using conditional formatting to develop a gantt chart which displays the tasks.

The calculation works fine but when I do not have a start date the answer is displayed as 00/01/1900, I do not want this to happen, I want to leave the cell empty or enter a 0. I have tried to use the ISBLANK function within the formula but this does not work.

Can anyone help?

Thanks
Kate

can you not just use something like;

=if(workday(date calc)=0,"",workday(date calc))

Hope that helps!

Cheers

Thank you very much, that did work. It created a problem with the conditional formatting but I managed to fix that!!

Thanks for taking the time to look at it.

Cheers
Kate

you're welcome...it beats dealing with the day job!

@ Kate67

Based on your last post it seems that you are satisfied with the solution(s) you've received but you haven't marked your thread as SOLVED. I'll do that for you now but please keep in mind for your future threads that Rule #9 requires you to do that yourself. If your problem has not been solved you can use Thread Tools (located above your first post) and choose "Mark this thread as unsolved".
Thanks.

Also, as a new member of the forum, you may not be aware that you can thank those who have helped you by clicking the small star icon located in the lower left corner of the post in which the help was given. By doing so you can add to the reputation(s) of those who helped.