The name Julián's name day is observed on January 9 in Spain.
Julián is a traditionally masculine name widely favored in Spanish and Portuguese-speaking countries, and its presence in the USA continues to grow steadily. It derives from the Latin name Iulianus, meaning 'descended from Julius,' connecting it directly to ancient Roman history. This classical heritage establishes Julián as a name of considerable historical depth and significant cultural standing. The name projects an inherently elegant, romantic, and sophisticated mood, suggesting both strength and cultural refinement. As a result of its strong history and melodic sound, Julián remains a globally recognized and cherished identifier.
| Country | Day | Month | Names |
 Latvia | 7 | January | Julians, Rota, Zigmars |
 Poland | 7 | January | Chociesław, Izydor, Julian, Lucjan, Walenty |
 Austria | 9 | January | Adrian, Alice, Eberhard, Julian |
 Denmark | 9 | January | Julianus |
| Poland | 9 | January | Antoni, Bazylissa, Borzymir, Julian, Julianna, Marcelina, Marcjanna |
| Austria | 27 | January | Angela, Julian |
| Poland | 27 | January | Angelika, Ilona, Jan Chryzostom, Julian, Przybysław |
| Poland | 28 | January | Agnieszka, Augustyn, Flawian, Ildefons, Julian, Karol, Leonidas, Piotr, Radomir, Roger, Waleriusz |
| Poland | 12 | February | Aleksy, Benedykt, Eulalia, Julian, Laurenty, Modest, Nora, Radzim, Trzebisława |
| Austria | 16 | February | Adalbert, Juliana, Liane, Philippa |
| Denmark | 16 | February | Juliane |
 Hungary | 16 | February | Julianna, Lilla |
| Latvia | 16 | February | Dzuljeta, Juliana, Julija, Smuidra |
 Norway | 16 | February | Jill, Julian, Juliane |
| Poland | 16 | February | Bernard, Dan, Danisz, Danuta, Julianna, Symeon |
| Poland | 17 | February | Donat, Donata, Franciszek, Izydor, Julian, Konstanty, Łukasz, Niegomir, Sylwin, Zbigniew, Zbyszko |
 Ukraine | 4 | March | Ulianna, Julianna |
| Poland | 8 | March | Beata, Filemon, Jan, Julian, Miligost, Miłogost, Stefan, Wincenty |
 Germany | 5 | April | Juliana |
 USA | 8 | April | Gillian, Jill, Jillian, Jolyon, Julia, Julian, Juliana, Julianna, Julianne, Julie, Julien, Juliet, Juliette, Julio, Julissa, Julius |
| Poland | 14 | April | Berenike, Julianna, Justyn, Maria, Myślimir, Tyburcjusz, Walerian, Waleriana |
| Austria | 19 | June | Juliana, Romuald |
| Poland | 19 | June | Borzysław, Gerwazy, Julianna, Odo, Protazy, Sylweriusz |
| Ukraine | 21 | June | Julian, Julius |
| Poland | 4 | July | Ageusz, Alfred, Aurelian, Elżbieta, Innocenta, Innocenty, Józef, Julian, Malwin, Malwina, Odo, Teodor, Wielisław |
| Austria | 2 | August | Eusebius, Julian, Pe |
| Poland | 17 | August | Anastazja, Angelika, Anita, Bertram, Eliza, Jacek, Jaczewoj, Joanna, Julianna, Liberat, Miron, Żanna, Zawisza |
| Poland | 19 | August | Bolesław, Emilia, Jan, Julian, Juliusz, Ludwik, Piotr, Sebald |
| Poland | 2 | September | Absalon, Bohdan, Czech, Czechasz, Czechoń, Czesław, Dersław, Dionizy, Eliza, Henryk, Julian, Stefan, Tobiasz, Wilhelm, Witomysł |
| Poland | 18 | October | Julian, Łukasz, René |
| Ukraine | 21 | December | Eva, Eve, Julianna, Ulianna |
Spain