Check A Cell Date Against Current Date

Hi Community.

Cell A1 = 01/09/2017

can I Ask Calc To Check the date in Cell A1 against the Current Date?

Maybe this would be done via an internet time server?

Thank-you for any help and guidance.

See the functions TODAY() and NOW()
From the Help:


Returns the computer system date and time. The value is updated when you recalculate the document or each time that a cell value is modified.


Returns the current computer system date. The value is updated when you reopen the document or modify values in the document.

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