The name Nia is officially celebrated as a name day in the United States on October 5.
The feminine name Nia has achieved significant popularity, particularly in the United States and the United Kingdom, admired for its sleek, two-syllable structure. It possesses rich and diverse linguistic origins, stemming both from Welsh traditions, where it suggests brightness, and from Swahili, where it powerfully means "purpose." Globally, the name is almost exclusively classified as female, reflecting its strong feminine identity. Nia’s history shows a growing preference for short, impactful names in recent decades, solidifying its place in modern naming trends. The overall mood associated with Nia is sophisticated, elegant, and infused with a determined, graceful tone. This combination makes it a cross-cultural favorite with deep historical recognition.
| Country | Day | Month | Names |
 Bulgaria | 2 | January | Ognian, Ogniana, Plamen, Plamena, Serafim, Silva, Silvia, Silviya, Silvana |
 Poland | 4 | January | Angelika, Aniela, Benedykta, Benita, Dobromir, Dobrymir, Eugeniusz, Grzegorz, Izabela, Leonia, Rygobert, Tytus |
 USA | 5 | January | Ladarius, Ladd, Laird, Lamont, Lane, Tania, Tanya, Tatiana, Tatyana, Tawni, Tawnya, Tia, Tiana, Tianna, Tonya |
 Greece | 6 | January | Theofania, Theofanis, Fani, Fannoula, Fotis, Fotini, Jordan, Ourania |
| Poland | 6 | January | Andrzej, Balcer, Baltazar, Bolemir, Epifania, Kacper, Kasper, Melchior |
 Russia | 6 | January | Evgenia, Klavdia |
 Slovakia | 6 | January | Antónia, Traja králi |
 Spain | 6 | January | Baltasar, Gaspar, Reyes, Adoración, Epifanía, Raymundo |
| Bulgaria | 7 | January | Ivan, Ivaylo, Ivanka, Vanio, Vania, Encho, Enio, Zhan, Zhana, Ivayla, Ivelin, Ivelina, Ivet, Ivo, Yoan, Ioan, Ioana, Yonka, Yonko, Yoncho, Yoto, Kaloyan, Kaloian |
 Italy | 7 | January | Epifania di N.S. |
 Hungary | 10 | January | Melánia |
| Spain | 11 | January | Alejandro, Guillermo, Hortensia, Higinia, Higinio, Modesto |
 Austria | 12 | January | Ernst, Tatjana, Xenia |
 Estonia | 12 | January | Antonia, Ande, Tooni |
| Spain | 12 | January | Alfredo, Tatiana, Tania, Hilario |
 Ukraine | 12 | January | Tetiana, Tania |
| Poland | 13 | January | Bogumił, Bogusąd, Bogusława, Godfryd, Gotfryd, Leoncjusz, Melania, Weronika |
| Bulgaria | 17 | January | Andon, Anton, Antonia, Dona, Doncho, Donka |
| Greece | 17 | January | Antonios, Antonia, Anthony, Tony, Theodosis |
| Hungary | 17 | January | Antal, Antónia |
| USA | 17 | January | Anthony, Antoine, Antoinette, Anton, Antonia, Antonio, Antony, Antwan, Ben, Benita, Benito, Benjamin, Bennie, Benny, Toni, Tony |
| Spain | 23 | January | Alberto, Ildefonso, Alberta, Armando, María Paz, Xenia |
| Ukraine | 23 | January | Clem, Clement, Clementine, Ksenia, Oksana |
| Bulgaria | 24 | January | Ksenia, Kseniya |
| Greece | 24 | January | Xenis, Xenia, Zosimas |
 Romania | 24 | January | Xenia |
| Ukraine | 30 | January | Gregory, Zenon, Zenonia, Zenia |
| Russia | 31 | January | Ksenia |
| Poland | 5 | February | Adelajda, Aga, Agata, Albin, Izydor, Jakub, Jan, Justynian, Paweł, Piotr, Strzeżysława |
| Poland | 6 | February | Angel, Angelus, Antoni, Bogdana, Bohdan, Bohdana, Dorota, Ksenia, Szymon, Tytus |
| Russia | 6 | February | Ksenia |
| Austria | 9 | February | Alto, Anna, Katharina, Katharine, Apollonia |
 Denmark | 9 | February | Apollonia |
| Poland | 9 | February | Apolonia, Bernard, Cyryl, Eryk, Eryka, Gorzysław, Mariusz, Nikifor, Rajnold |
| Spain | 9 | February | Donato, Sabino, Reinaldo, Apolonia |
| USA | 9 | February | Apollo, Apollonia, Carson, Dalton |
| Italy | 10 | February | Apollonia |
| Romania | 13 | February | Acvila, Evloghie, Martinian, Priscila |
| Romania | 22 | February | Evghenia |
| Poland | 6 | March | Eugenia, Felicyta, Frydolin, Jordan, Klaudian, Koleta, Róża, Wiktor, Wiktoriusz, Wojsław |
| Italy | 15 | March | Matilde di Sassonia |
| Romania | 29 | March | Denia, Marcu |
| USA | 30 | March | Adin, Adon, Adonia, Adonis, Amada, Amadea, Amadeus |
| Bulgaria | 31 | March | Veniamin |
| Italy | 31 | March | Beniamino |
| Poland | 31 | March | Amos, Balbina, Beniamin, Dobromira, Gwidon, Kirył, Korneli, Kornelia |
| Romania | 31 | March | Denia, Ipatie |
| USA | 2 | April | Ebba, Eboni, Ebony, Gardenia, Gardner, Garnet, Garnett |
| Italy | 6 | April | Virginia |
| USA | 7 | April | Armand, Armanda, Armando, Armin, Armon, Erma, Herman, Herminia, Hermione, Irma |
| Poland | 16 | April | Benedykt, Bernadetta, Cecyl, Cecylian, Charyzjusz, Erwin, Erwina, Julia, Ksenia, Lambert, Lamberta, Nikita, Nosisław, Patrycy, Urban |
| Romania | 16 | April | Agapi, Hionia, Irina |
| Poland | 22 | April | Heliodor, Kajus, Leonia, Leonid, Łukasz, Soter, Strzeżymir, Teodor |
| Denmark | 27 | April | Ananias |
| Austria | 6 | May | Antonia, Britto, Gundula |
| USA | 15 | May | Sofia, Sonia, Sonya, Sophia, Sophie, Ward, Wardell |
| Spain | 21 | May | Constantino, Virginia, Giselle, Valente |
| Spain | 25 | May | Valentín, Valentina, Sonia |
| Poland | 31 | May | Aniela, Bożysława, Ernesta, Ernestyna, Feliks, Petronela, Petronia, Petroniusz, Teodor |
| Ukraine | 31 | May | Petronella, Petrina, Petrunia |
| Slovakia | 2 | June | Xénia |
| Spain | 2 | June | Erasmo, Marcelino, Blandina, Edelmira, Ausonia |
| Spain | 3 | June | Oliva, Kevin, Cecilio, Davino, Clotilde, Luciniano |
| Italy | 7 | June | Sabiniano |
| Ukraine | 10 | June | Antonina, Antonia |
| Spain | 13 | June | Antonio de Padua, Antonia, Joel, Andoni |
| Poland | 18 | June | Efrem, Elżbieta, Gerwazy, Leonia, Marek, Marina, Paula |
| Slovakia | 23 | June | Sidónia |
| USA | 23 | June | Audra, Audrey, Dashawn, Deshawn, Elton, Ethel, Josiah, Josias, Shaina, Shania, Shaun, Shauna, Shawn, Shawna, Shayna, Shayne, Shonda |
| Romania | 25 | June | Fevronia |
| Poland | 30 | June | Alpinian, Ciechosława, Cyryl, Emilia, Lucyna, Marcjal |
| Slovakia | 30 | June | Melánia |
| Poland | 2 | July | Juda, Maria, Martynian, Otto, Piotr, Urban |
| Spain | 2 | July | Visitación, Martiniano, Vidal, Teodorico, Teobaldo |
| USA | 2 | July | Othello, Otis, Otto, Penelope, Penny, Petunia |
| Hungary | 7 | July | Apollónia |
| Poland | 8 | July | Adrian, Adrianna, Chwalimir, Edgar, Elżbieta, Eugeniusz, Kilian, Prokop, Wirginia |
| USA | 13 | July | Ezra, Joel, Joelle, Mildred, Natalia, Natalie, Nataly, Natasha, Nathalie, Nathan, Nathanael, Nathania, Nathaniel, Tasha |
| USA | 19 | July | Arcenia, Arcenio, Arsenia, Arsenio, Wayne |
| USA | 20 | July | Edna, Edwin, Edwina, Elias, Elijah, Ellice, Elliot, Elliott, Ellis, Ellison, Neal, Neala, Neil, Neila, Nelson, Niall, Nigel, Niles |
| Poland | 22 | July | Albin, Bolesława, Bolisława, Laurencjusz, Maria Magdalena, Milenia, Pankracy, Wawrzyniec, Więcemiła |
| Hungary | 30 | July | Judit, Xénia |
| Slovakia | 7 | August | Štefánia |
| USA | 23 | August | Eugene, Eugenia, Geena, Gena, Gene, Genie, Gina, Jina, River, Zaccheus |
| Greece | 1 | September | Simeon, Ourania, Penelope, Joshua, Mando, Clea, Aspasia, Antigoni, Margaret, Athina |
| Poland | 6 | September | Albin, Beata, Eugenia, Eugeniusz, Magnus, Michał, Uniewit, Zachariasz |
| Poland | 13 | September | Aleksander, Aureliusz, Eugenia, Filip, Lubor, Materna, Morzysław, Szeliga |
| Poland | 16 | September | Antym, Cyprian, Edda, Edyta, Eufemia, Eugenia, Franciszek, Jakobina, Kamila, Kornel, Lucja, Łucja, Sebastiana, Sędzisław, Wiktor, Wiktoriusz |
| Greece | 17 | September | Sofia, Sophia, Sonia, Agapis, Elpidas |
| Ukraine | 17 | September | Lubov, Nadia, Sophia, Luba, Sonia |
| Poland | 18 | September | Dobrowit, Irena, Irma, Józef, Ryszarda, Stefania, Tytus, Zachariasz |
| Slovakia | 18 | September | Eugénia |
| Poland | 19 | September | Alfons, Alfonsyna, January, Konstancja, Sydonia, Teodor, Więcemir |
| Poland | 21 | September | Bożeciech, Bożydar, Hipolit, Hipolita, Ifigenia, Jonasz, Laurenty, Mateusz, Mira |
| Bulgaria | 1 | October | Anani, Anania |
| Greece | 1 | October | Ananias, Romanos |
 Sweden | 17 | October | Antonia, Toini |
| Austria | 25 | October | Krispin, Krispinian |
| Greece | 30 | October | Zinovios, Apollonia |
| USA | 30 | October | Arilda, Xena, Xenia, Ximena, Zena, Zenas, Zenia, Zeno, Zenobia |
| Sweden | 5 | November | Eugen, Eugenia |
| Ukraine | 11 | November | Mina, Stephania, Victor, Vincent |
| Austria | 14 | November | Nikolaus, Sidonia |
| Denmark | 17 | November | Anianus |
| Austria | 20 | November | Bernward, Edmund, Korbinian |
 Germany | 20 | November | Korbinian |
| Greece | 21 | November | Soultana, Despina, Maria, Virginia |
| USA | 26 | November | Mallory, Rashad, Rashawn, Yesenia, Yessenia |
| USA | 27 | November | Fergus, Farrel, Farrell, Ferrell, Ginger, Virgil, Virgilia, Virginia |
| Hungary | 28 | November | Stefánia |
| Sweden | 8 | December | Virginia |
| Ukraine | 14 | December | Apollonia |
| Poland | 16 | December | Adelajda, Ado, Albina, Alina, Ananiasz, Bean, Zdzisława |
| Poland | 19 | December | Abraham, Beniamin, Dariusz, Gabriela, Mścigniew, Nemezjusz, Tymoteusz, Urban |
| Bulgaria | 20 | December | Ignat, Ognian, Plamen, Plamena |
| Estonia | 23 | December | Eugenia, Senna, Senni |
| Bulgaria | 24 | December | Blagorodna, Evgeni, Evgenia, Zheni, Zhechka, Parvan, Parvana, Bistra |
| Greece | 24 | December | Evgenia, Ahmet, Eugenia |
| Poland | 24 | December | Ada, Adam, Adamina, Adela, Ewa, Ewelin, Ewelina, Godzisława, Grzegorz, Grzymisława, Hermina, Herminia, Irma, Irmina, Zenobiusz |
| Romania | 24 | December | Eugenia |
| Ukraine | 24 | December | Eugenia |
| Austria | 25 | December | Anastasia, Eugenia, Josefina, Therese |
| Hungary | 25 | December | Eugénia |
| Poland | 25 | December | Anastazja, Eugenia, Piotr, Spirydion |
| Spain | 25 | December | Belén, Eugenia, Natividad |
| USA | 26 | December | Esteban, Estefania, Estefany, Estevan, Stefan, Stefanie, Stephan, Stephanie, Stephany, Stephen, Steve, Steven, Stevie |
| Greece | 27 | December | Stefanos, Stefania, Stephania, Stephan, Steven |
| Poland | 31 | December | Korneliusz, Mariusz, Melania, Sebastian, Sylwester, Tworzysław |
| Romania | 31 | December | Melania |
| Ukraine | 31 | December | Melania |
| USA | 31 | December | Malone, Melania, Melanie, Melany, Silas, Silvester, Sylvester |