This is the 15498th most frequent Polish word.
spóźnione
"Spóźnione" means "late" or "delayed" in English.
The word "spóźniony" indicates the state of being late or delayed, used to describe the train.
Mój pociąg jest spóźniony o dwadzieścia minut.
My train is delayed by twenty minutes.
The word "spóźnione" is used to describe the birthday wishes as being sent late, expressing the delay.
Otrzymałem spóźnione życzenia urodzinowe od kolegi.
I received belated birthday wishes from a colleague.
Here, "spóźnione" qualifies the response, indicating it was sent late.