The name day for Alen is recognized on September 8th in Croatia.
Alen is historically linked to Celtic origins, often interpreted to mean "handsome" or "rock," suggesting ancient strength and resilience. In the USA, it functions as a less common but recognizable variant of Alan, maintaining a classic and simple profile among registered names. This name is unequivocally identified as masculine across the world, retaining a consistent male gender classification across regions. The mood associated with Alen is strong, reliable, and elegantly straightforward, projecting dependability rather than complexity. Its history traces a lineage through various European naming traditions, solidifying it as a concise, globally viable choice.
| Country | Day | Month | Names |
 Austria | 7 | January | Raimund, Valentin |
 Poland | 7 | January | Chociesław, Izydor, Julian, Lucjan, Walenty |
 Latvia | 30 | January | Parsla, Valentina |
 Bulgaria | 10 | February | Valentin, Valentina, Valia, Lambi, Haralambi, Haralampi |
| Austria | 14 | February | Cyrill, Method, Valentin |
| Bulgaria | 14 | February | Valentin, Valentina, Valya, Valyo |
 Croatia | 14 | February | Valentin, Valentina, Zdravko |
 Czechia | 14 | February | Valentýn |
 Denmark | 14 | February | Valentinus |
 Estonia | 14 | February | Valentin, Valle, Vallo, Vallot, Vallut, Valjo, Valju |
 Finland | 14 | February | Voitto, Valentin, Tino |
 France | 14 | February | Valentin |
 Greece | 14 | February | Valentinos, Dinos, Dina, St. Valentine’s Day |
 Hungary | 14 | February | Bálint, Valentin |
| Latvia | 14 | February | Algis, Valentins |
 Lithuania | 14 | February | Liliana, Saile, Saulius, Valentinas |
| Poland | 14 | February | Adolf, Adolfa, Adolfina, Alf, Cyryl, Dobiesława, Dobisława, Józef, Józefa, Konrad, Konrada, Krystyna, Lilian, Liliana, Mikołaj, Niemir, Niemira, Walenty, Zenon, Zenona |
 Slovakia | 14 | February | Valentín |
 Spain | 14 | February | Dionisio, Valentín, Valentina, Odile |
 Sweden | 14 | February | Valentin |
 USA | 14 | February | Lovell, Lowell, Valentin, Valentina, Valentine, Valiant |
 Italy | 15 | February | Valentino |
 Russia | 23 | February | Anna, Valentina |
| Latvia | 20 | March | Irbe, Made, Magda, Magdalena |
| Slovakia | 27 | March | Alena |
| Poland | 2 | May | Afanazy, Anatol, Atanazy, Longin, Longina, Walenty, Walter, Witomir, Zygmunt |
| Poland | 13 | May | Andrzej, Aron, Ciechosław, Gloria, Magdalena, Piotr, Robert, Roberta, Serwacy |
| Lithuania | 21 | May | Vaidivutis, Valentas, Vydmina |
| Poland | 21 | May | Donat, Donata, Jan, Kryspin, Przecława, Pudens, Tymoteusz, Walenty, Wiktor, Wiktoriusz |
| Spain | 21 | May | Constantino, Virginia, Giselle, Valente |
| Austria | 25 | May | Beda, Gregor, Magdalene |
| Poland | 25 | May | Epifan, Grzegorz, Imisława, Maria Magdalena, Urban |
| Spain | 25 | May | Valentín, Valentina, Sonia |
| Poland | 27 | May | Beda, Izydor, Jan, Juliusz, Lucjan, Magdalena, Radowit |
| Lithuania | 29 | May | Algedas, Erdvile, Magdalena, Magde |
| Poland | 29 | May | Bogusława, Maksymilian, Maria Magdalena, Teodor, Teodozja |
| Poland | 1 | June | Alfons, Alfonsyna, Bernard, Fortunat, Gracjana, Hortensjusz, Jakub, Konrad, Konrada, Magdalena, Nikodem, Świętopełk, Symeon |
| Poland | 13 | June | Antoni, Chociemir, Herman, Lucjan, Maria Magdalena, Tobiasz |
| Austria | 17 | June | Adolf, Alena, Volker |
| Poland | 27 | June | Maria Magdalena, Władysław, Władysława, Włodzisław |
| Bulgaria | 6 | July | Avakum, Valentin, Valentina, Valya, Valia |
| Poland | 16 | July | Andrzej, Benedykt, Dziersław, Dzierżysław, Eustachiusz, Eustachy, Faust, Maria Magdalena, Marika, Ostap, Ruta, Stefan |
 Ukraine | 16 | July | Ruth, Valentina, Valia |
| Poland | 17 | July | Aleksander, Aleksy, Andrzej, Bogdan, Dzierżykraj, Januaria, Julietta, Leon, Marceli, Marcelina, Maria Magdalena |
| Austria | 22 | July | Maria Magdalena |
| Bulgaria | 22 | July | Lena, Magda, Magdalena, Manda, Meglena, Miglena |
| Croatia | 22 | July | Marija Magdalena |
| Czechia | 22 | July | Magdaléna |
| Denmark | 22 | July | Magdalene, Maria |
 Germany | 22 | July | Magdalena |
| Greece | 22 | July | Magdalini, Magda, Magdalena, Lena, Markella |
| Italy | 22 | July | Maria Maddalena |
| Lithuania | 22 | July | Dalius, Magdalena, Mantile, Marija |
 Norway | 22 | July | Malene, Mali, Malin |
| Poland | 22 | July | Albin, Bolesława, Bolisława, Laurencjusz, Maria Magdalena, Milenia, Pankracy, Wawrzyniec, Więcemiła |
| Slovakia | 22 | July | Magdaléna |
| Spain | 22 | July | Teófila, Zoraida, Magdalena, Zaida, Primitiva |
| Sweden | 22 | July | Madeleine, Magdalena |
| USA | 22 | July | Amaya, Magda, Magdalen, Magdalena, Magdalene |
| Austria | 25 | July | Jakobus, Thomas, Valentina |
| France | 25 | July | Jacques, Valentine |
| Poland | 25 | July | Jakub, Krzysztof, Nieznamir, Sławosz, Walentyna |
| Russia | 29 | July | Alevtina, Valentina |
| Czechia | 13 | August | Alena |
| Slovakia | 11 | October | Valentína |
| Ukraine | 24 | October | Valentine |
| Lithuania | 2 | November | Gedartas, Gedile, Valentinas, Valys |
| USA | 11 | November | Chandler, Dallas, Jalen, Johnathan, Johnathon, Jon, Jonatan, Jonathan, Jonathon, Jonte, Jorel, Jorrell, Lincoln |
| Poland | 13 | November | Arkadiusz, Arkady, Brykcjusz, Eugeniusz, Jan, Mikołaj, Stanisław, Walentyn |
| USA | 22 | November | Abbey, Abbie, Abby, Abigail, Cecelia, Cecil, Cecilia, Cecily, Cecyl, Celia, Gael, Gail, Galen, Gay, Gayle, Philemon, Philo, Shayla, Sheila |
| Denmark | 28 | November | Magdalene, Sophie |
| Sweden | 10 | December | Malena, Malin |
| USA | 16 | December | Addie, Addy, Adela, Adelaide, Adele, Adeline, Adella, Adelle, Alena, Alina, Aline, Della |