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# Dynamic date formula

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6 - Interface Innovator

Hey guys

I have a brain drain problem with how I should set up a dynamic date formula, I have 2 tables in a base, one for odd weeks and one for even weeks. They both just contain 5 records, one for each workday. I have separate fields where the current date is shown, current weekday, current week number and if the current week is odd or even (it shows 0 for even and 1 for even). Now to the tricky part.

I want to show in a field in the even table (week 50), lets say today Wednesday the 14th of dec. I want todays date to be visible in that field, on Tuesday the 13th should be visible and on tomorrow the 15th and so on. And I also want if the dates in the odd table shows next weeks date, and then when it becomes an odd week the even table updates the dates to the week after the odd. Any of you geniuses have a solution in mind?

1 Solution

Accepted Solutions
8 - Airtable Astronomer

It seems I managed it working.

Calendar formula

``IF(Today <= Date, Date, DATEADD(Date, 14, "day"))``

Date formula

``DATEADD(Today,Autonumber-WEEKDAY(Today),"day")``

Today formula

``Today()``

21 Replies 21
8 - Airtable Astronomer

@Jesper_Holmstro , hi there! Is it what you expected to get?

I will explain later if it is in the right direction.

6 - Interface Innovator

Hi @Andrey_Kovalev yes that looks as it could do the trick?

8 - Airtable Astronomer

So, Autonumber field is used to increment the date.

Date formula is

``DATEADD(TODAY(),Autonumber,"day")``

Name formula is

``DATETIME_FORMAT(Date, "dddd")``

Week formula is

``WEEKNUM(Date)``

Odd Even formula is

``MOD(Week,2)``
6 - Interface Innovator

Hi @Andrey_Kovalev sorry but that didn't do the trick. Since there are 2 tables, one for odd weeks and one for even weeks they get the same date hence the auotnumber is the same 1-5. So I don't really know how to get forward

The formulas for the name, week and Odd even works fine.

8 - Airtable Astronomer

What is the reason of having two separate tables for odd and even weeks?

6 - Interface Innovator

I sort of need the autonumber to change every day so the dates are up to date?

6 - Interface Innovator

Its 2 different sides in the user interface made for clients.

8 - Airtable Astronomer

I made a mistake in Date formula. Instead of TODAY() a fixed date should be used, otherwise the date would shift every new day

``DATEADD(DATETIME_PARSE("2022-12-14"),Autonumber - 1,"day")``

8 - Airtable Astronomer

@Jesper_Holmstro wrote:

Its 2 different sides in the user interface made for clients.

Do not get the idea. Creating two different views on the same table would not work?

6 - Interface Innovator

Ok thanks @Andrey_Kovalev I test with the new formula, the idea is that its different API reading from the tables, it may work with views, I got to test with the api and the system that reads it.

6 - Interface Innovator

It seems that the week formula shows the wrong week? there is no week 53 in 2022?

6 - Interface Innovator

Found it, you have to tell the formula to start on Mondays so the week formula should be

`WEEKNUM(Date,"Monday")`

6 - Interface Innovator

Hi @Andrey_Kovalev , The formula doesn't work like I want to, maybe I explained it wrong. The 2 weeks calendar should be "rolling", i.e today the 14th will after midnight local time change the date to Wednesday in 2 weeks time, the 28 th. Any ideas would be much appreciated?

8 - Airtable Astronomer

Are you going to keep older records or replace them with new ones? Do you mean the 14th to be replaced with the 28th OR do you mean that after the 14th next comes the 29th in your calendar?

6 - Interface Innovator

HI @Andrey_Kovalev , thank you for your time. There are just 10 records (2 weeks of workdays) , the 14th will be replaced with a new date, just a date change when passing midnight on the right day. As you see in the picture I now use the same table for both odd and even weeks. So the 14th should have changed date to 28th yesterday midnight because its the next upcoming even Wednesday.

6 - Interface Innovator

@kuovonne do you have a genius idea up your sleeve?

Best regards

Jesper

8 - Airtable Astronomer

I can't imagine how to achieve your goal without automation. It seems I can go through the cycle, but have no idea how to fix Monday as a first record.

8 - Airtable Astronomer

It seems I managed it working.

Calendar formula

``IF(Today <= Date, Date, DATEADD(Date, 14, "day"))``

Date formula

``DATEADD(Today,Autonumber-WEEKDAY(Today),"day")``

Today formula

``Today()``

6 - Interface Innovator

Hi @Andrey_Kovalev Yeah that might work, I will test it right away!