Column date departure time to automatically set to 00:00:00

[poural]

Hello, I have a start date column, with in view: CONTEXT("ViewType")<>"Form.

I created a Clocked In slice with: ISBLANK([Start date/time]).

I want this column date departure time to automatically set to 00:00:00, if no date departure time is entered at 00:00:00.

Sorry for my rough English‌‌

THANK YOU for your help!

[Steve]

https://help.appsheet.com/en/articles/961507-app-formulas-and-initial-values