Condition if cell contains date

Hello,

I don't know how to solve my problem, so I will explain it:
my Excel sheet contains several tabs, the first tab has a table with columns (name/location/recovery time/return time/date....), and the following tabs contain various other information.
In my last tab, I have a summary table that retrieves certain information from my different tabs.

I have a cell that retrieves a date from the table in my first tab, and I want this cell to display text when the date shown is a specific date.

For example:
in my summary table, cell A1 contains ='Tab 1'!H29 (which is a date)
I want it to show "Validated" if the date is equal to January 1st, otherwise it should leave the information as it is.

Is this possible? How can I do this?
Thank you for your help.

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