View permission

I want to give view permission to my user for limited time only. For this I have created a time column. Is it possible? If so how!

AND(
whatever expression you already have,
TIMENOW() >= [showTime],
TIMENOW() < [outTime]
)

Update: On a second thought, your times in the sheet should be UTC, and your expression should use UTCNOW() instead of TIMENOW(), otherwise, your users will be easily able to circumvent your restriction.

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