Dion's name day is July 6 in Denmark, October 9 in USA.
Dion is a name with widespread recognition, particularly in the United States and various European nations where it has maintained steady usage for decades. The name stems from classical Greek origins, functioning as an independent form that carries a sense of historical gravitas. It is primarily categorized as a masculine name, known for its smooth, elegant, and strong personality. Many find the name to be both professional and approachable, fitting well across different cultural landscapes. Its enduring presence in name registries reflects its status as a timeless and versatile choice. The name consistently projects a sophisticated and confident vibe.
| Country | Day | Month | Names |
 Greece | 23 | January | Agathagellos, Dionisis |
 Spain | 14 | February | Dionisio, Valentín, Valentina, Odile |
 Poland | 26 | February | Aleksander, Bogumił, Cezariusz, Dionizy, Mirosław, Nestor |
 Romania | 10 | March | Anecton, Ciprian, Codrat, Crescent, Dionisie, Pavel |
 Croatia | 20 | March | Klaudija, Dionizije, Vladislav |
| Croatia | 8 | April | Dionizije, Alemka |
 Lithuania | 8 | April | Dionyzas, Girtautas, Julija, Skirgaile |
| Poland | 8 | April | Apolinary, Cezary, Cezaryna, Dionizy, Gawryła, January, Radosław, Sieciesława |
| Romania | 8 | April | Agav, Irodion, Lazar, Ruf |
| Spain | 8 | April | Dionisio, Amancio |
| Greece | 10 | April | Eteoklis, Hercules, Homer, Timothy, Dionisis, Pericles, Sofocles |
| Poland | 21 | April | Addar, Anzelm, Bartosz, Drogomił, Feliks, Irydion, Konrad, Konrada, Selma |
| Romania | 3 | May | Irodion, Mavra, Timotei |
| Poland | 15 | May | Afanazy, Atanazy, Berta, Cecyliusz, Czcibora, Dionizja, Izydor, Jan, Nadzieja, Ruprecht, Strzeżysław, Zofia |
| Romania | 3 | June | Claudie, Dionisie, Ipatie, Luchilian, Paul |
| Romania | 1 | September | Dionisie |
| Poland | 2 | September | Absalon, Bohdan, Czech, Czechasz, Czechoń, Czesław, Dersław, Dionizy, Eliza, Henryk, Julian, Stefan, Tobiasz, Wilhelm, Witomysł |
| Poland | 9 | September | Augustyna, Aureliusz, Dionizy, Gorgoncjusz, Pimen, Piotr, Ścibor, Ścibora, Sergiusz, Sobiesąd |
| Poland | 20 | September | Dionizy, Eustachiusz, Eustachy, Fausta, Faustyna, Filipina, Irena, Oleg, Ostap, Sozant |
| Poland | 2 | October | Dionizy, Leodegar, Stanimir, Teofil, Trofim |
 Bulgaria | 3 | October | Ruska, Dionisii |
| Greece | 3 | October | Dionisios, Dennis |
| Romania | 3 | October | Dionisie |
 Austria | 9 | October | Dionys, Günter, Sara, Johannes |
| Croatia | 9 | October | Ljudevit Bertran, Dionizije, Ivan Leon |
 Denmark | 9 | October | Dionysius |
 Italy | 9 | October | Dionigi e compagni |
| Lithuania | 9 | October | Dionyzas, Geditas, Virgaile |
| Poland | 9 | October | Arnold, Arnolf, Atanazja, Bogdan, Dionizjusz, Dionizy, Jan, Ludwik, Przedpełk |
 Slovakia | 9 | October | Dionýz |
| Spain | 9 | October | Abrahan, Dionisio |
| Poland | 16 | October | Ambroży, Aurelia, Dionizy, Florentyna, Galla, Gallina, Gaweł, Gerard, Gerarda, Gerhard, Grzegorz, Radzisław |
| Romania | 10 | November | Cuart, Erast, Olimp, Rodion, Sosipatru |
| Poland | 16 | November | Aureliusz, Dionizy, Edmund, Gertruda, Leon, Marek, Maria, Niedamir, Otomar, Paweł, Piotr |
| Poland | 17 | November | Dionizy, Floryn, Grzegorz, Hugo, Hugon, Salome, Salomea, Sulibor, Zbysław |
| Poland | 6 | December | Dionizja, Emilian, Jarema, Jarogniew, Mikołaj |
| Poland | 14 | December | Alfred, Arseniusz, Izydor, Naum, Pompejusz, Sławobor, Spirydion |
| Greece | 17 | December | Daniel, Dionisios |
| Poland | 25 | December | Anastazja, Eugenia, Piotr, Spirydion |
| Poland | 26 | December | Dionizy, Szczepan, Wróciwoj |
| Poland | 30 | December | Dawid, Dawida, Dionizy, Eugeniusz, Irmina, Katarzyna, Łazarz, Rainer, Sabin, Sewer, Uniedrog |
USA