How to compare dates in SharePoint List “A” to another Date in List “B”

Question

So, I would like to Compare if any of my Dates from List "A" is between my StartDate and EndDate from List "B". I am new to sharepoint and any Article can show step by step would be greatly appreciated.

LIST "A"

Holiday	Dates
1	05/12/2021
2	07/04/2021

LIST "B"

STARTDATE	Dates	YES/NO (CALCULATED FIELD)
05/01/2021	05/18/2021	YES
06/01/2021	07/03/2021	NO

need a calculated field like below:

YES/NO (CALCULATED FIELD)=  IF LISTA.DATES BETWEEN LISTB.DATE THEN YES ELSE NO

OR

Hardcoding those days?

Answer 1

Lookup column (and its additional fields) cannot be referred in the Calculated column formula, if that is what you plan to do.

There are a few workarounds to achieve this requirement, for example:

1. Build a SharePoint 2013 workflow / Microsoft Flow to retrieve the corresponding value from List A and then fill it in another column in List B, so that it can be used in the calculated column formula.
2. Use workflow / flow to do the comparison and update the YES/NO field directly (without using calculated column and formula). It should be a Text or Yes/No column in this scenario.

You can see the reference here for a tutorial on using SharePoint 2013 workflow: Using Lookup Field in Calculated Column SharePoint.

And the calculated column formula should be:

IF(AND([<Ref.>]<=[ENDDATE],[<Ref.>]>=[STARTDATE]),"YES","NO")

Reference: IF function.