Celebrating and thinking of someones birthday

In Islam, celebrating birthdays n wishing people on their birthdays are not allowed. But is it permissible to let someone know u remember today is their birth day?
Like assume today is a friends birthday and i send a text as the following:-
‘ hey u know we dont celebrate nor wish happt birthday but just want u to know i still remember which day it is today’
Is this permissible?

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