Karolin: Name day
Name Day List: Karolin
| Country | Day | Month | Names |
 Estonia | 20 | June | Karola, Karoliine, Karolin, Kaari, Karlotte, Lota |
 Poland | 5 | August | Cyriak, Emil, Karolin, Maria, Nonna, Oswald, Oswalda, Stanisława |
Name Day List - similar names (Karolin)
| Country | Day | Month | Names |
 Austria | 28 | January | Karoline, Caroline, Manfred, Thomas |
 Norway | 28 | January | Karl, Karoline |
 Hungary | 2 | February | Karolina, Aida |
| Poland | 9 | May | Beatus, Bożydar, Grzegorz, Job, Karolina, Mikołaj |
 Sweden | 20 | May | Carola, Karolina |
 Slovakia | 3 | June | Karolína |
 Lithuania | 5 | July | Butginas, Filomena, Karolina, Mantmile |
| Poland | 5 | July | Antoni, Bartłomiej, Filomena, Jakub, Karolina, Michał, Przybywoj, Szarlota, Wilhelm |
 Czechia | 14 | July | Karolína |
| Poland | 18 | July | Arnold, Arnolf, Erwin, Erwina, Kamil, Karolina, Robert, Roberta, Szymon, Unisław, Wespazjan |
| Lithuania | 6 | August | Bylotas, Daiva, Karolina |