How to Set a Default Date When Using a Date Field in a LookerStudio Control

[taiga_fukagawa]

Hello, I have a question about Looker Studio as mentioned in the title.

Background:
The data source contains a field called "target_month." The "target_month" field contains monthly data as shown below:

• 2024-01-01
• 2024-02-01
• 2024-03-01
• 2024-04-01 ...

Minimum Goal:

• I want to set a specific default date.
  • Example: I want the default to be set to March 2024.

Ideal Goal:

• I want the default to be set to the previous month.
  • Example: When viewing data in October 2024, I want September 2024 to be selected by default.

Issues:

• Even if I set a fixed value like "2024-03-01" in "Default selection," it is not selected by default, and I don't understand the reason.
• I am not sure if it is possible to set a variable instead of a fixed value in the "Default selection."

Is there a way to achieve this?