Mari's designated name day occurs on March 25 in both Estonia and Norway. A separate celebration is observed on July 2 in Finland.
Mari is an established feminine name globally, functioning as a favored variant of Maria, signifying meanings related to beloved or purity. In the USA, it has maintained a consistent, though not dominant, presence, often introduced through immigrants from Nordic or Eastern European nations. Historically, the name’s brevity ensures its enduring use across varied cultures, rooted firmly in classical tradition. The mood associated with Mari is one of sophisticated simplicity and soft elegance. Classification worldwide is almost exclusively female.
| Country | Day | Month | Names |
 Austria | 1 | January | Maria, Wilhelm |
 Croatia | 1 | January | Marija |
 Italy | 2 | January | Maria Madre di Dio |
| Austria | 4 | January | Angela, Marius, Rüdiger, Titus |
 Finland | 16 | January | Ilmari, Ilmo |
 Spain | 17 | January | Alba, Antonio, Mariana, Mariano, Alfredo |
| Spain | 18 | January | Florida, Beatriz, Mario, Pia |
| Austria | 19 | January | Agritius, Marius, Martha, Pia |
| Croatia | 19 | January | Mario, Ljiljana, Marta |
 France | 19 | January | Marius |
 Hungary | 19 | January | Sára, Márió |
 Lithuania | 19 | January | Gedvile, Marijus, Morta, Raivedys |
 Norway | 19 | January | Margunn, Marius |
 Poland | 19 | January | Andrzej, Bernard, Erwin, Erwina, Eufemia, Henryk, Kanut, Mariusz, Marta, Matylda, Mechtylda, Pia, Racimir, Sara |
 Russia | 19 | January | Lidia, Maria |
 Slovakia | 19 | January | Mário, Drahomíra |
| Spain | 19 | January | Mario, Vicente, Sebastián |
| Italy | 20 | January | Mario e fam. |
| Poland | 23 | January | Emerencja, Ildefons, Jan, Klemens, Maria, Rajmund, Rajmunda, Wrócisława |
| Spain | 23 | January | Alberto, Ildefonso, Alberta, Armando, María Paz, Xenia |
 USA | 25 | January | Amari, Amir, Amira, Amarion, Gwayne, Hakon, Hawk, Jamari, Prince, Princess |
 Czechia | 31 | January | Marika |
| Croatia | 2 | February | Marijan |
| Poland | 2 | February | Joanna, Korneliusz, Maria, Miłosława |
| Poland | 4 | February | Andrzej, Gilbert, Jan, Joanna, Józef, Mariusz, Weronika, Witosława |
| Russia | 8 | February | Maria |
| Poland | 9 | February | Apolonia, Bernard, Cyryl, Eryk, Eryka, Gorzysław, Mariusz, Nikifor, Rajnold |
| Hungary | 11 | February | Bertold, Marietta |
| Poland | 11 | February | Adolf, Adolfa, Adolfina, Alf, Bernadetta, Dezydery, Eufrozyna, Łazarz, Lucjan, Maria, Olgierd, Świętomira |
 Ukraine | 16 | February | Marianna, Theodore |
| Italy | 18 | February | Marianna, Severa |
| Russia | 19 | February | Maria |
 Greece | 28 | February | Marianna, Kyra |
| Norway | 28 | February | Maren, Marina |
 Sweden | 28 | February | Maria |
| Croatia | 3 | March | Anzelmo, Marin, Kamilo |
| France | 3 | March | Guénolé, Marin |
| Russia | 12 | March | Kira, Marina |
| Greece | 13 | March | Leandros, Marios |
| Austria | 15 | March | Klemens, Clemens, Maria, Luise |
| Italy | 16 | March | Luisa de Marillac |
 Bulgaria | 25 | March | Blagovest, Blagovesta, Blagoi, Blaga, Blago, Blaguna, Bonka, Boncho, Marian, Mariana, Blazhe, Evangelina, Vangel, Dobri, Dobrina, Dobrinka |
| Czechia | 25 | March | Marian |
 Latvia | 25 | March | Mara, Marina, Marita, Marite |
| Poland | 25 | March | Dyzma, Ireneusz, Lucja, Łucja, Lutomysł, Maria, Mariola, Wieńczysław |
| Slovakia | 25 | March | Marián |
| Latvia | 30 | March | Ilgmaris, Ilgmars, Larisa, Nanija |
| Russia | 31 | March | Maria |
| Sweden | 4 | April | Marianne, Marlene |
| Italy | 5 | April | Vincenzo Maria Strambi |
| Austria | 8 | April | Beate, Rose-Marie, Walter |
| Croatia | 9 | April | Marija Kleofina, Demetrije |
| Italy | 9 | April | Maria di Cleofa |
| Poland | 14 | April | Berenike, Julianna, Justyn, Maria, Myślimir, Tyburcjusz, Walerian, Waleriana |
| Russia | 14 | April | Maria |
 Denmark | 16 | April | Mariane |
| Italy | 24 | April | Fedele da Sigmaringen |
| USA | 25 | April | Marc, Marcel, Marcella, Marcia, Marcila, Marco, Marcos, Marcus, Marcy, Maricela, Mario, Marisol, Mark, Markus, Marsha |
| Poland | 26 | April | Artemon, Klaudiusz, Klet, Marcelin, Marcelina, Maria, Marzena, Spycimir |
| USA | 26 | April | Clarence, DeMarco, Demarcus, Demario |
| Poland | 28 | April | Arystarch, Maria, Paweł, Przybyczest, Waleria, Witalis |
| Lithuania | 30 | April | Marijonas, Sofija, Venta, Virbutas |
| Poland | 30 | April | Bartłomiej, Chwalisława, Eutropiusz, Jakub, Katarzyna, Lilla, Marian |
| Sweden | 30 | April | Mariana |
| Poland | 3 | May | Aleksander, Antonina, Maria, Mariola, Świętosława |
| France | 6 | May | Marien, Prudence |
| Sweden | 6 | May | Marit, Rita |
| Croatia | 8 | May | Marija posrednica, Marina, Ida |
| Sweden | 11 | May | Märit, Märta |
| Croatia | 24 | May | Marija Pom., Prijenos sv. Dom. |
| Poland | 24 | May | Cieszysława, Estera, Jan, Joanna, Maria, Mokij, Wincenty, Zula, Zuzanna |
| Poland | 25 | May | Epifan, Grzegorz, Imisława, Maria Magdalena, Urban |
| Poland | 26 | May | Beda, Filip, Marianna, Paulina, Więcemił, Wilhelmina |
| Poland | 29 | May | Bogusława, Maksymilian, Maria Magdalena, Teodor, Teodozja |
| Croatia | 1 | June | Marija, Justin, Malden |
| USA | 1 | June | Brigham, June, Junella, Marilee, Marilou, Marilu, Marilyn, Marylynn |
| Greece | 2 | June | Nikiforos, Marinos |
| Poland | 2 | June | Efrem, Erazm, Eugeniusz, Marcelin, Maria, Marianna, Mikołaj, Nicefor, Piotr, Racisław |
| Austria | 8 | June | Elga, Maria, Medardus |
| Austria | 9 | June | Annamaria, Ephraim, Grazia |
| Poland | 13 | June | Antoni, Chociemir, Herman, Lucjan, Maria Magdalena, Tobiasz |
| Austria | 18 | June | Elisabeth, Ilsa, Marina |
| Lithuania | 18 | June | Arnulfas, Ginbutas, Marina, Vaiva |
| Poland | 18 | June | Efrem, Elżbieta, Gerwazy, Leonia, Marek, Marina, Paula |
| Spain | 18 | June | Justo, Marceliano, Marina |
| USA | 18 | June | Effie, Efrain, Eph, Ephraim, Marina, Marnie, Nevaeh |
| Croatia | 20 | June | Bezgrešno Srce Marijino, Naum Ohrid. |
| Russia | 20 | June | Maria, Valeria |
| USA | 20 | June | Earl, Earline, Errol, Fatima, Ofelia, Omar, Omarion, Ophelia |
| Russia | 22 | June | Maria |
| Austria | 23 | June | Edeltraud, Marion, Ortrud |
| Poland | 27 | June | Maria Magdalena, Władysław, Władysława, Włodzisław |
 Estonia | 1 | July | Eha, Ehala, Hämarik |
| Hungary | 1 | July | Tihamér, Annamária |
| Poland | 1 | July | Aaron, Bogusław, Halina, Klarysa, Marian, Niegosława, Teobald |
| Lithuania | 2 | July | Gantaute, Jotvingas, Marijonas |
| Poland | 2 | July | Juda, Maria, Martynian, Otto, Piotr, Urban |
| Italy | 5 | July | Antonio Maria Zaccaria |
| Austria | 6 | July | Goar, Isaias, Marietta |
| Croatia | 6 | July | Marija Goretti |
| France | 6 | July | Mariette, Nolwen |
| Italy | 6 | July | Maria Goretti |
| Spain | 8 | July | Adrián, Edgar, Marina, Priscila |
| Croatia | 9 | July | Marija Petkovic |
| France | 9 | July | Amandine, Hermine, Iphigénie, Marianne |
| Estonia | 13 | July | Margareeta, Margit, Mareta, Maret, Marita, Marit, Marge, Mare, Meeta, Greta, Grete, Kreet, Kreeta, Reet, Reeda |
| Latvia | 13 | July | Alda, Margarita, Margrieta, Mariska, Perle |
| Poland | 16 | July | Andrzej, Benedykt, Dziersław, Dzierżysław, Eustachiusz, Eustachy, Faust, Maria Magdalena, Marika, Ostap, Ruta, Stefan |
| Bulgaria | 17 | July | Marin, Marina, Marinela |
| Greece | 17 | July | Marinos, Marina, Alexandra, Sandra |
| Poland | 17 | July | Aleksander, Aleksy, Andrzej, Bogdan, Dzierżykraj, Januaria, Julietta, Leon, Marceli, Marcelina, Maria Magdalena |
| Austria | 19 | July | Bernulf, Marina, Poppo, Reto |
| France | 20 | July | Elie, Marina |
| Norway | 20 | July | Margareta, Margit, Marit |
| Austria | 22 | July | Maria Magdalena |
| Croatia | 22 | July | Marija Magdalena |
| Denmark | 22 | July | Magdalene, Maria |
| Italy | 22 | July | Maria Maddalena |
| Latvia | 22 | July | Margita, Marija, Marika, Marina, Marisandra |
| Lithuania | 22 | July | Dalius, Magdalena, Mantile, Marija |
| Poland | 22 | July | Albin, Bolesława, Bolisława, Laurencjusz, Maria Magdalena, Milenia, Pankracy, Wawrzyniec, Więcemiła |
| Latvia | 25 | July | Jekabs, Marika |
| USA | 26 | July | Ana, Anika, Anissa, Anita, Aniya, Aniyah, Ann, Anna, Anne, Annette, Annie, Annika, Annis, Annmarie, Anson, Anya, Blake, Hanna, Hannah, Nancy, Nanette, Nina |
| Latvia | 27 | July | Dita, Mariona, Marta |
| Norway | 27 | July | Marita, Rita |
| Poland | 29 | July | Beatrice, Beatrycze, Beatryks, Cierpisław, Faustyn, Konstantyn, Lucylla, Maria, Marta, Olaf, Serafina, Urban |
| Russia | 30 | July | Margarita, Marina |
| Estonia | 1 | August | Maira, Maire, Mairi, Maris |
| Italy | 1 | August | Alfonso Maria de' Liguori |
| Poland | 2 | August | Alfons, Alfonsyna, Borzysława, Gustaw, Ilia, Karina, Maria, Stefan |
| Italy | 4 | August | Giovanni Maria Vianney |
| Poland | 4 | August | Alfred, Arystarch, Dominik, Maria, Mironieg, Protazy |
| Russia | 4 | August | Maria |
| Spain | 4 | August | Juan María Vianney |
| Poland | 5 | August | Cyriak, Emil, Karolin, Maria, Nonna, Oswald, Oswalda, Stanisława |
| Bulgaria | 15 | August | Mara, Marian, Mariana, Maria, Mariyan, Masha, Mika, Mira, Mario, Despina, Panaiot |
| Croatia | 15 | August | Marija, Velika |
| Finland | 15 | August | Marjatta, Marja, Jaana, Marianna, Marianne, Marita, Maritta, Marjaana, Marjo, Marjukka, Marjut, Jatta, Marju |
| France | 15 | August | Alfred, Marie |
| Greece | 15 | August | Mary, Marcy, Maria, Despina, Marios, Panagiotis, Panagiota, Simela, Crystal |
| Hungary | 15 | August | Mária |
| Norway | 15 | August | Margot, Marielle, Mary |
| Poland | 15 | August | Maria, Napoleon, Stefan, Stella, Trzebimir |
| Spain | 15 | August | Asunción, Estrella, María, Paloma, José de Calasanz |
| USA | 15 | August | Madonna, Malia, Mara, Maria, Mariah, Marian, Mariana, Maribel, Marie, Marisa, Marissa, Maritza, Marla, Mary, Maryann, Mimi, Miriam, Mitzy, Molly, Napoleon, Polly |
| Croatia | 22 | August | BD Marija Kraljica, Regina, Vladislava |
| Poland | 22 | August | Cezary, Dalegor, Fabrycjan, Fabrycy, Hipolit, Hipolita, Maria, Namysław, Oswald, Oswalda, Tymoteusz, Zygfryd |
| Poland | 26 | August | Dobroniega, Joanna, Konstanty, Maksym, Maria, Wiktorian, Zefir, Zefiryn, Zefiryna |
| Slovakia | 7 | September | Marianna |
| Croatia | 8 | September | Mala Gospa, Marica, Maja, Alen |
| Czechia | 8 | September | Mariana |
| Estonia | 8 | September | Mariann, Marianna, Marianne |
| Hungary | 8 | September | Mária, Adrienn |
| Poland | 8 | September | Adrian, Adrianna, Klementyna, Maria, Nestor, Radosław, Radosława |
| Ukraine | 8 | September | Maria, Mary |
| Austria | 12 | September | Gerfried, Maria |
| Croatia | 12 | September | Ime Marijino, Marija |
| Czechia | 12 | September | Marie |
| Hungary | 12 | September | Mária |
| Lithuania | 12 | September | Gvidas, Marija, Tolvaldas, Vaidmante |
| Poland | 12 | September | Amadeusz, Amedeusz, Cyrus, Gwidon, Maria, Piotr, Radzimir, Sylwin |
| Slovakia | 12 | September | Mária |
| Spain | 12 | September | Dulce, María de Lluc |
| Poland | 15 | September | Albin, Budzigniew, Maria, Nikodem |
| Latvia | 20 | September | Guntra, Marianna |
| Latvia | 22 | September | Maigurs, Maris, Marisa, Mariss, Morics |
| Poland | 24 | September | Gerard, Gerarda, Gerhard, Maria, Teodor, Tomir, Uniegost |
| USA | 4 | October | Damara, Damaris, Berenice, Bernice, Bonita, Bonnie, Bunny, Fannie, Fanny, Frances, Francesca, Francesco, Francine, Francis, Francisco, Frank, Frankie |
| Austria | 7 | October | Jörg, Justina, Rosa Maria |
| Poland | 7 | October | Amalia, Justyna, Marek, Maria, Rościsława, Stefan, Tekla |
| Estonia | 9 | October | Riin, Riina, Riine, Mariina |
| Czechia | 10 | October | Marina |
| Poland | 11 | October | Aldona, Brunon, Burchard, Dobromiła, Emil, Emilian, Emiliusz, Germanik, Maria, Marian, Placydia |
| Croatia | 16 | October | Margareta Marija Alacoque |
| Spain | 16 | October | Margarita, María Alacoque |
| Lithuania | 17 | October | Gyte, Kintautas, Marijonas, Ritone |
| Poland | 17 | October | Lucyna, Małgorzata, Marian, Sulisława, Wiktor, Wiktoriusz |
| Croatia | 22 | October | Marija Saloma, Dražen, Cedomil |
| Sweden | 22 | October | Marika, Marita |
| Italy | 24 | October | Antonio Maria Claret |
| Spain | 24 | October | Antonio María Claret |
| Hungary | 1 | November | Marianna |
| Poland | 16 | November | Aureliusz, Dionizy, Edmund, Gertruda, Leon, Marek, Maria, Niedamir, Otomar, Paweł, Piotr |
| Finland | 20 | November | Jalmari, Jari, Jare |
| Sweden | 20 | November | Marina, Pontus |
| Greece | 21 | November | Soultana, Despina, Maria, Virginia |
| Norway | 21 | November | Mariann, Marianne |
| Poland | 21 | November | Albert, Alberta, Albertyna, Janusz, Konrad, Konrada, Maria, Piotr, Regina, Rena, Rufus, Twardosław, Wiesław |
| Spain | 3 | December | Francisco Javier, María del Sol |
| Croatia | 7 | December | Ambrozije, Bl. Marin |
| Hungary | 8 | December | Mária |
| Latvia | 8 | December | Guna, Gunars, Marieta, Vladimirs |
| Norway | 8 | December | Marion, Marlene, Morgan |
| Poland | 8 | December | Boguwola, Klement, Maria, Światozar, Wirginiusz |
| Slovakia | 8 | December | Marína |
| France | 10 | December | Eulaire, Romaric |
| Poland | 10 | December | Andrzej, Daniel, Judyta, Julia, Maria, Radzisława |
| Ukraine | 10 | December | Angeline, Marian |
| Estonia | 19 | December | Maarius, Mario, Mairo |
| Russia | 29 | December | Marina |
| Poland | 31 | December | Korneliusz, Mariusz, Melania, Sebastian, Sylwester, Tworzysław |