Converting a Date field to a Last Modified Date field without losing past dates

[Tobin_Perry]

I have a "date paid" date field that I've realized I could automate better by transitioning it to a checkmark (paid?) and a last modified date field. But when I do that I lose all the paid dates paid (which impacts other calculations throughout my table). Is there any way to get around this?

[Steve_Haysom]

Hi Tobin

Would it be easier to keep the date paid field and add a button that updates the field to today's date using a script, or a checkbox that updates it using an automation?

[Universus]

Hey Tobin_Perry,

I'd suggest you create a formula field with:

IF ( {Field_with your dates} , {Field_with your dates}, LAST_MODIFIED_TIME ( {Name of the field with checkbox} ) )

This will check if you have a date where you have been writing dates,
If there is, it writes it.
If not, it will use the last time you checked the checkbox of the new field you want to create.

Let me know if this answers your need 🙂

Cheers!
Julien

[Universus · Accepted solution]

@Tobin_Perry 

Here is a video response I got from the support of Airtable. (I was having a similar need than you).

https://share.support.airtable.com/bLu5RL0Q 

Hope it helps 😇

[Tobin_Perry]

Thanks that worked!