# Calculate Dates to display notice for Deadline

Hello everyone,

I’m new to Airtable and I’m struggling to come up with a formula that calculates the different scenarios in relation to the timeframes for the tasks to be performed.

I would like to post a notice describing the situation in relation to the various remaining timeframes.

I am here so far, but i have an error that prevent notices to be displayed and I am lost… :

``````IF( Deadline = BLANK(),
/* Deadline is not entered */
"To be planned...",
SWITCH( {End date} != BLANK(),
DATETIME_DIFF( Deadline, {End date}, 'days' ) >= 0, "DEADLINE IS TODAY !",
DATETIME_DIFF( Deadline, {End date}, 'days' ) < 0, DATETIME_DIFF({Délai}, TODAY(), 'days') & " DAYS LATE !"),
DATETIME_DIFF( Deadline, {End date}, 'days' ) > 0,
"Delivered on time"
)
)
``````

Can anyone help? I would be very grateful

Have a Good day !

I think you are on the right track. At first glance, I see a couple problems. First, it’s best to avoid using BLANK() in formulas. It’s a known issue that it sometimes doesn’t evaluate properly.

Airtable will inherently evaluate whether a field is blank or not by just referencing the field name. For example…

``````IF({Deadline}, ...
``````

is the same thing is as saying…

``````IF({Deadline} != BLANK(), ...
``````

Next, I don’t think a SWITCH() statement will work for this formula. Unfortunately, you can’t pass a condition to evaluate whether the value matches or not; you need to compare a single value to another. I would change this to an IF() statement.

To simplify a bit, I added a field called {Days Overdue} with the following formula:

`IF({Deadline}, DATETIME_DIFF(IF({End Date}, {End Date}, TODAY()), {Deadline}, 'days'))`

This gives the number of days overdue, or a negative value if the date is in the future. You can then refer to this in your longer formula to keep it a bit easier to follow.

`IF({Deadline}, IF(AND({End Date}, {Days Overdue} <= 0), "Delivered On Time", IF({Days Overdue} = 0, "Deadline is Today!", IF({Days Overdue} > 0, {Days Overdue} & " DAYS LATE !"))), "To be planned...")`

I hope this helps!

1 Like

Thank you very much !
It works like a charm…

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