Ján's name day is June 24 in Slovakia.
Ján is a widely popular name in Slovakia and Czechia, frequently appearing in the United States among families of Central European descent. It originates from Hebrew, meaning God is gracious, and has a long history as a traditional masculine identifier. The name is purely male in its identity, providing a strong and reliable vibe to those who bear it. Its tone is characterized by an elegant simplicity that feels both powerful and timeless. This classic choice has sustained its appeal through centuries of cultural change while maintaining its core linguistic structure.
| Country | Day | Month | Names |
 Croatia | 5 | January | Emilijana, Radoslav, Miljenko |
| Croatia | 7 | January | Rajmund, Lucijan, Zorislav |
 Poland | 7 | January | Chociesław, Izydor, Julian, Lucjan, Walenty |
| Croatia | 9 | January | Julijan, Živko, Miodrag |
| Poland | 9 | January | Antoni, Bazylissa, Borzymir, Julian, Julianna, Marcelina, Marcjanna |
 Latvia | 10 | January | Dorisa, Karmena, Tatjana |
| Poland | 10 | January | Agaton, Dobrosław, Jan, Nikanor, Paweł, Wilhelm |
 Spain | 11 | January | Alejandro, Guillermo, Hortensia, Higinia, Higinio, Modesto |
 Sweden | 11 | January | Jan, Jannike |
 Austria | 12 | January | Ernst, Tatjana, Xenia |
| Poland | 12 | January | Antoni, Arkadiusz, Arkady, Benedykt, Czech, Czechasz, Czechoń, Czesław, Czesława, Ernest, Ernestyn, Greta, Reinhold, Tycjan |
| Poland | 17 | January | Antoni, Jan, Rościsław |
| Croatia | 19 | January | Mario, Ljiljana, Marta |
| Croatia | 20 | January | Fabijan, Sebastijan |
| Croatia | 21 | January | Agneza, Janja, Neža |
| Croatia | 23 | January | Emerencijana, Ema, Vjera, Milko |
| Poland | 23 | January | Emerencja, Ildefons, Jan, Klemens, Maria, Rajmund, Rajmunda, Wrócisława |
| Poland | 25 | January | Miłosz, Miłowan, Miłowit, Paweł, Tacjanna, Tatiana |
| Croatia | 27 | January | Angela, Vitalijan, Pribislav |
| Poland | 27 | January | Angelika, Ilona, Jan Chryzostom, Julian, Przybysław |
| Spain | 30 | January | Alejandro |
| Poland | 31 | January | Cyrus, Euzebiusz, Jan, Ksawery, Ludwik, Marceli, Marcelin, Marcelina, Piotr, Spycigniew, Wirgiliusz |
| Croatia | 2 | February | Marijan |
| Poland | 4 | February | Andrzej, Gilbert, Jan, Joanna, Józef, Mariusz, Weronika, Witosława |
| Poland | 5 | February | Adelajda, Aga, Agata, Albin, Izydor, Jakub, Jan, Justynian, Paweł, Piotr, Strzeżysława |
| Poland | 8 | February | Gniewomir, Gniewosz, Honorat, Jan, Ksenofont, Lucjusz, Paweł, Piotr, Salomon, Sebastian, Żaklina |
| Poland | 11 | February | Adolf, Adolfa, Adolfina, Alf, Bernadetta, Dezydery, Eufrozyna, Łazarz, Lucjan, Maria, Olgierd, Świętomira |
| Croatia | 12 | February | Reginald, Damjan, Eulalija |
| Croatia | 16 | February | Onezim, Julijana, Miljenko |
| Croatia | 18 | February | Angelico, Šimun, Flavijan, Gizela |
| Poland | 2 | March | Absalon, Franciszek, Halszka, Helena, Henryk, Januaria, Krzysztof, Lew, Michał, Paweł, Piotr, Radosław, Symplicjusz |
 USA | 3 | March | Alasdair, Alastair, Alec, Alejandra, Alejandro, Alex, Alexa, Alexander, Alexandra, Alexandria, Alexia, Alexis, Alexus, Ali, Alondra, Dale, Darnell, Lex, Lexi, Lexie, Lexus, Sandra, Sandy, Sasha, Xander, Zander |
 Hungary | 5 | March | Adorján, Adrián |
| Poland | 5 | March | Adrian, Adrianna, Fryderyk, Jan, Pakosław, Pakosz, Wacław, Wacława |
| Poland | 8 | March | Beata, Filemon, Jan, Julian, Miligost, Miłogost, Stefan, Wincenty |
| Croatia | 10 | March | Emilijan, Emil, Krunoslav |
| Croatia | 12 | March | Bernard, Budislav, Maksimilijan |
| Poland | 13 | March | Bożena, Ernest, Ernestyn, Kasjan, Krystyna, Marek, Roderyk, Rodryg, Rodryk, Trzebisław |
| Croatia | 14 | March | Matilda, Miljana, Borka |
| Croatia | 16 | March | Hrvoje, Miljan |
| Poland | 17 | March | Gertruda, Harasym, Jan, Patrycjusz, Patryk, Regina, Rena, Zbigniew, Zbygniew, Zbyszko |
| Spain | 20 | March | Alejandra, Claudia |
| Croatia | 21 | March | Kristijan, Vesna, Vlasta |
| Poland | 27 | March | Benedykt, Ernest, Ernestyn, Jan, Lidia, Rościmir, Rupert |
| Spain | 27 | March | Ruperto, Lilia, Alejandro |
| Poland | 28 | March | Aniela, Antoni, Jan, Krzesisław, Sykstus |
| Poland | 30 | March | Amelia, Aniela, Częstobor, Jan, Kwiryn, Kwiryna |
 Denmark | 8 | April | Janus |
| Poland | 8 | April | Apolinary, Cezary, Cezaryna, Dionizy, Gawryła, January, Radosław, Sieciesława |
 Finland | 12 | April | Julia, Julius, Janna, Juliaana, Janni, Juulia, Juuli |
| Poland | 13 | April | Hermenegild, Hermenegilda, Ida, Jan, Justyn, Małgorzata, Przemysł, Przemysław |
| Croatia | 14 | April | Valerijan, Maksim |
| Croatia | 20 | April | Janja, Marcijan |
 Norway | 21 | April | Jannike, Jeanette |
| Finland | 23 | April | Yrjö, Jyrki, Jyri, Jiri, Jori, Yrjänä |
| Spain | 3 | May | Juvenal, Violeta, Evencio, Teódulo, Alejandro, Estela, Felipe |
| Sweden | 3 | May | Jane, John |
| Croatia | 4 | May | Florijan, Cvjetko, Cvijeta |
| Poland | 4 | May | Florian, Grzegorz, January, Michał, Monika, Paulin, Strzeżywoj |
| Poland | 6 | May | Benedykta, Benita, Dytrych, Gościwit, Jan, Judyta, Jurand |
| Poland | 10 | May | Antonin, Częstomir, Izydor, Jan, Symeon, Wiktoryna |
| Poland | 12 | May | Domicela, Domicjan, Dominik, Epifani, Flawia, Jan, Jazon, Joanna, Pankracy, Wszemił |
| Latvia | 14 | May | Aiva, Duda, Elfa, Krisjanis, Kriss |
| Poland | 15 | May | Afanazy, Atanazy, Berta, Cecyliusz, Czcibora, Dionizja, Izydor, Jan, Nadzieja, Ruprecht, Strzeżysław, Zofia |
| Poland | 16 | May | Andrzej, Honorat, Jan Nepomucen, Jędrzej, Szymon, Trzebomysł, Ubald, Wieńczysław, Wiktorian |
| Spain | 18 | May | Alejandra, Félix, Próspero |
| Poland | 19 | May | Augustyn, Celestyn, Iwo, Mikołaj, Pękosław, Piotr, Potencjana |
| Poland | 21 | May | Donat, Donata, Jan, Kryspin, Przecława, Pudens, Tymoteusz, Walenty, Wiktor, Wiktoriusz |
| Poland | 22 | May | Emil, Helena, Jan, Julia, Krzesisława, Rita, Wiesław, Wiesława, Wisława |
| Poland | 23 | May | Budziwoj, Dezyderiusz, Dezydery, Emilia, Iwona, Jan, Leontyna, Michał, Symeon |
 Czechia | 24 | May | Jana |
| Poland | 24 | May | Cieszysława, Estera, Jan, Joanna, Maria, Mokij, Wincenty, Zula, Zuzanna |
| Poland | 27 | May | Beda, Izydor, Jan, Juliusz, Lucjan, Magdalena, Radowit |
| Spain | 29 | May | Alejandro, Justo, Teodosia |
| Hungary | 30 | May | Janka, Zsanett |
| Poland | 1 | June | Alfons, Alfonsyna, Bernard, Fortunat, Gracjana, Hortensjusz, Jakub, Konrad, Konrada, Magdalena, Nikodem, Świętopełk, Symeon |
| Poland | 4 | June | Bazyliusz, Dacjan, Franciszek, Gościmił, Karol, Karp |
| Croatia | 8 | June | Dijana, Cecilija, Medardo, Vilim |
 Estonia | 9 | June | Haljand, Hallar, Hellar, Helar, Helari, Elar |
| Poland | 9 | June | Felicjan, Pelagia, Pelagiusz |
| Croatia | 10 | June | Margareta, Dijana, Bl. Ivan Dominici |
| Poland | 12 | June | Antonina, Bazyli, Jan, Leon, Onufry, Wyszemir |
| Poland | 13 | June | Antoni, Chociemir, Herman, Lucjan, Maria Magdalena, Tobiasz |
| Poland | 16 | June | Alina, Aneta, Benon, Budzimir, Jan, Justyna, Ludgarda |
| Poland | 17 | June | Adolf, Adolfa, Adolfina, Agnieszka, Alf, Drogomysł, Franciszek, Laura, Marcjan, Radomił, Rainer, Wolmar |
| Croatia | 18 | June | Marko, Marcelijan, Ljubomir |
| Czechia | 24 | June | Jan |
| Estonia | 24 | June | Johannes, Johan, Juhan, Juho, Jaan, Jan, Kanek, Janno, Jukk, Juss, Hannes, Annes, Hans, Ants |
| Finland | 24 | June | Johannes, Juhani, Jussi, Jani, Janne, Juha, Juhana, Juho, Jukka |
| Latvia | 24 | June | Janis, Zanis |
| Poland | 24 | June | Dan, Danisz, Danuta, Emilia, Jan, Wilhelm |
| USA | 24 | June | Hans, Giovanna, Giovanni, Ian, Ivan, Jan, Jana, Jean, Jeanette, Jeannette, Johan, John, Johnnie, Johnny, Juan, Juana, Juanita, Sean, Shana, Shane, Shanna, Yancy |
| Hungary | 26 | June | János, Pál |
| Poland | 26 | June | Jan, Jeremi, Jeremiasz, Paweł, Zdziwoj |
| Croatia | 28 | June | Irenej, Smiljan |
| Norway | 9 | July | Gøran, Jøran, Ørjan |
| Sweden | 9 | July | Jörgen, Örjan |
| Poland | 10 | July | Aleksander, Amelia, Aniela, Filip, January, Radziwoj, Rufina, Samson, Sylwan, Sylwana, Witalis |
| Poland | 12 | July | Andrzej, Euzebiusz, Feliks, Henryk, Jan Gwalbert, Paweł, Piotr, Tolimir, Weronika |
| Poland | 17 | July | Aleksander, Aleksy, Andrzej, Bogdan, Dzierżykraj, Januaria, Julietta, Leon, Marceli, Marcelina, Maria Magdalena |
| Poland | 18 | July | Arnold, Arnolf, Erwin, Erwina, Kamil, Karolina, Robert, Roberta, Szymon, Unisław, Wespazjan |
| Croatia | 20 | July | Ilija prorok, Ilijana |
| Norway | 21 | July | Jane, Janne, Johanne |
| Croatia | 24 | July | Kristina Bols., Mirjana |
| Croatia | 4 | August | Ivan M. Vianney, Ivica, Tertulijan |
| Poland | 6 | August | Felicysym, Jakub, January, Sława, Stefan, Sykstus, Wincenty |
| Poland | 9 | August | Jan, Klarysa, Miłorad, Roland, Roman, Romuald |
| Croatia | 13 | August | Poncijan, Hipolit, Ivan Berchmans |
| Poland | 13 | August | Diana, Dianna, Gertruda, Helena, Hipolit, Hipolita, Jan, Kasjan, Radomiła, Wojbor |
| Croatia | 14 | August | Maksimilijan Kolbe, Alfred |
| Estonia | 15 | August | Johanna, Hanna, Jaana, Jaanika, Jana, Janika, Janne, Jenny, Nanna |
| Austria | 17 | August | Gudrun, Hyazinth, Janine |
| Poland | 19 | August | Bolesław, Emilia, Jan, Julian, Juliusz, Ludwik, Piotr, Sebald |
| Poland | 20 | August | Bernard, Jan, Sabin, Samuel, Samuela, Sieciech, Sobiesław, Świeciech, Szwieciech |
| Latvia | 21 | August | Janina, Linda, Sidnejs |
 Slovakia | 21 | August | Jana |
| USA | 21 | August | Gianna, Jane, Janelle, Janessa, Janet, Janette, Janice, Janie, Janine, Janiya, Jayne, Shanice, Sheena |
| Poland | 22 | August | Cezary, Dalegor, Fabrycjan, Fabrycy, Hipolit, Hipolita, Maria, Namysław, Oswald, Oswalda, Tymoteusz, Zygfryd |
| Poland | 29 | August | Flora, Jan, Racibor, Sabina |
| Poland | 3 | September | Antoni, Bartłomiej, Bazylissa, Bronisław, Bronisz, Erazma, Eufemia, Eufrozyna, Izabela, Jan, Joachim, Joachima, Manswet, Mojmir, Szymon, Wincenty, Zenon, Zenona |
| Poland | 11 | September | Feliks, Jacek, Jan, Naczesław, Prot |
| Croatia | 16 | September | Kornelije, Cipirijan |
| Austria | 19 | September | Igor, Januarius |
| Croatia | 19 | September | Januarije, Emilija |
| Poland | 19 | September | Alfons, Alfonsyna, January, Konstancja, Sydonia, Teodor, Więcemir |
| Norway | 24 | September | Jan, Jens |
| Croatia | 26 | September | Kuzma, Damjan, Damir |
| Poland | 28 | September | Jan, Laurencjusz, Luba, Lubosza, Marek, Nikita, Salomon, Sylwin, Wacław, Wacława, Wawrzyniec, Więcesław |
| Poland | 1 | October | Benigna, Cieszysław, Dan, Danisz, Danuta, Igor, Jan, Remigiusz |
| Croatia | 3 | October | Kandid, Maksimilijan, Evald |
| Croatia | 5 | October | Rajmund of Capua, Flavijan, Miodrag |
| Poland | 9 | October | Arnold, Arnolf, Atanazja, Bogdan, Dionizjusz, Dionizy, Jan, Ludwik, Przedpełk |
| Croatia | 11 | October | Emilijan, Bruno K. |
| Poland | 20 | October | Budzisława, Irena, Jan Kanty, Kleopatra, Wendelin, Witalis |
| Poland | 23 | October | Iga, Ignacja, Ignacy, Jan, Marlena, Odilla, Roman, Seweryn, Teodor, Włościsław, Żegota |
| Poland | 26 | October | Dymitriusz, Ewaryst, Eweryst, Łucjan, Lucyna, Ludmiła, Lutosław |
| Estonia | 13 | November | Kristjan, Krister, Kristo, Risto |
| Poland | 13 | November | Arkadiusz, Arkady, Brykcjusz, Eugeniusz, Jan, Mikołaj, Stanisław, Walentyn |
| Finland | 15 | November | Janina, Janika, Janita, Janette |
| Croatia | 19 | November | Janja Asiška, Matilda, Krispin |
| Poland | 21 | November | Albert, Alberta, Albertyna, Janusz, Konrad, Konrada, Maria, Piotr, Regina, Rena, Rufus, Twardosław, Wiesław |
| Poland | 24 | November | Dobrosław, Emilia, Emma, Flora, Franciszek, Gerard, Gerarda, Gerhard, Jan, Mina, Pęcisław, Protazy |
| Poland | 26 | November | Delfin, Dobiemiest, Jan, Konrad, Konrada, Lechosław, Lechosława, Leonard, Sylwester |
| Austria | 2 | December | Bibiana, Jan, Lucius |
| Croatia | 2 | December | Bibijana, Blanka |
| Poland | 3 | December | Franciszek, Kasjan, Ksawery, Lucjusz, Unimir |
| Latvia | 15 | December | Jana, Johanna |
| Croatia | 16 | December | Lazar, Izak, Jolanda, Florijan |
| Croatia | 17 | December | Gacijan, Bosiljko, Rufo, Dražen |
| Poland | 18 | December | Bogusław, Gracjan, Gracjana, Laurencja, Wilibald, Wszemir |
| Croatia | 26 | December | Ivan ev., Ivo, Janko |
| Hungary | 27 | December | János |
| Poland | 27 | December | Cezary, Fabia, Fabiola, Jan, Radomysł |