This is the 15854th most frequent Polish word.
tamten
"Tamten" means "that" (used to refer to something further away or previously mentioned).
'Tamten' in this sentence specifies a particular day in the past that is contextually relevant.
Tamten dzień był pełen niezapomnianych chwil.
That day was full of unforgettable moments.
The word 'tamten' is used as a demonstrative pronoun referring to a specific house already known or indicated.
Tamten dom jest bardzo stary.
That house is very old.
Here, 'tamten' points to a specific car at the given location, emphasizing its particular reference.