The name Ola is recognized with specific name day traditions in two Nordic countries. The name day for Ola is celebrated on April 19th in Sweden and on July 29th in Norway.
The name Ola holds significant cultural weight across several continents, notably popular in Scandinavia, Poland, and parts of West Africa. Its widespread usage in Norway often stems from its role as a masculine short form of Olav, whereas in Poland it is a common feminine diminutive of Aleksandra. Etymologically, it has vastly different meanings, deriving from 'ancestor’s relic' in Norse or meaning 'wealth' in Yoruba. Historically, its brief structure has allowed it to easily cross linguistic borders and adopt new roles. Gender classification is regionally specific, ranging from exclusively male in the Nordic countries to predominantly female in Eastern Europe, and it projects a brisk, friendly, and universally approachable mood.
| Country | Day | Month | Names |
 USA | 20 | January | Fabia, Fabian, Fabiola, Sebastian, Sebastiana |
 Austria | 23 | January | Hartmut, Heinrich, Nikolaus |
| USA | 26 | January | Aubrey, Conan, Coner, Conner, Connor, Conor, Gonzalo, Paola, Paula, Paulette, Paulina, Pauline |
 Hungary | 28 | January | Károly, Karola |
 Spain | 28 | January | Tomas, Pedro Nolasco |
 Latvia | 2 | February | Spidola, Spidols |
 Italy | 9 | February | Girolamo Emiliani |
| Austria | 10 | February | Scholastika, Siegmar |
 Croatia | 10 | February | Alojzije, Skolastika |
 Denmark | 10 | February | Scholastica |
 Poland | 10 | February | Elwira, Gabriel, Jacek, Jacenty, Scholastyka, Tomisława |
| Spain | 10 | February | Guillermo, Amancio, Arnaldo, Arnau, Ecolástica |
| Latvia | 15 | February | Aloizs, Alvils, Olafs, Olavs, Ulafs |
 Romania | 2 | March | Nicolae, Teodot |
| Poland | 3 | March | Asteriusz, Hieronim, Kunegunda, Lucjola, Maryna, Wierzchosława |
| Austria | 6 | March | Fridolin, Nicola, Rosa |
| Spain | 21 | March | Clemencia, Fabiola, Nicolás |
| Italy | 22 | March | Nicola di Flue |
| Spain | 24 | March | Delmiro, Edelmira, Edelmiro, Timolao |
| Poland | 25 | March | Dyzma, Ireneusz, Lucja, Łucja, Lutomysł, Maria, Mariola, Wieńczysław |
| Italy | 2 | April | Francesco da Paola |
| Latvia | 21 | April | Anastasija, Margers, Margonis, Nilola |
 Norway | 24 | April | Albert, Olaug |
| Austria | 3 | May | Jakob, Philipp, Viola |
| Poland | 3 | May | Aleksander, Antonina, Maria, Mariola, Świętosława |
| USA | 3 | May | Joletta, Trey, Troy, Viola, Violet, Violetta, Yolanda |
| Latvia | 4 | May | Flora, Florians, Viola, Vizbulite |
 Lithuania | 8 | May | Audrius, Dziugas, Mykolas |
| Romania | 9 | May | Isaia, Nicolae |
 Slovakia | 9 | May | Roland |
 France | 10 | May | Solange |
| Spain | 10 | May | Job, Solange, Gordiano |
| France | 13 | May | Maël, Orlane, Rolande |
| Hungary | 13 | May | Szervác, Imola |
| Croatia | 16 | May | Ivan Nepomuk, Andrija Bobola, Nenad |
| Slovakia | 18 | May | Viola |
 Sweden | 20 | May | Carola, Karolina |
 Czechia | 25 | May | Viola |
| Latvia | 30 | May | Kredo, Lola, Lolita, Vitolds |
| Lithuania | 2 | June | Aukse, Azuolas, Erazmas, Eugenijus |
 Estonia | 3 | June | Kanni, Kannike, Viola, Jolanta |
 Finland | 3 | June | Orvokki, Viola |
| Czechia | 14 | June | Roland |
| Hungary | 15 | June | Jolán, Vid |
| Poland | 15 | June | Abraham, Angelina, Bernard, Jolanta, Leona, Leonida, Nikifor, Wit, Witold, Witołd, Witolda, Witosław, Wodzisław |
| Estonia | 20 | June | Karola, Karoliine, Karolin, Kaari, Karlotte, Lota |
| Spain | 29 | June | Ciro, David, Siro, Paola, Pablo, Pedro |
| USA | 3 | July | Anatol, Anatola, Lindsay, Lindsey, Lyndsey |
| France | 11 | July | Benoit, Olga, Yolande |
| Austria | 14 | July | Goswin, Kamilus, Roland |
| Hungary | 15 | July | Örkény, Henrik, Roland |
| Romania | 26 | July | Ermolae, Ioanichie |
| Austria | 29 | July | Ladislaus, Martha, Olaf |
| Estonia | 29 | July | Olev, Olav, Olavi, Olaf |
| Finland | 29 | July | Olavi, Olli, Uolevi, Uoti, Oula |
 Germany | 29 | July | Olaf |
| Poland | 29 | July | Beatrice, Beatrycze, Beatryks, Cierpisław, Faustyn, Konstantyn, Lucylla, Maria, Marta, Olaf, Serafina, Urban |
| Spain | 29 | July | Marta, Olavo |
| USA | 29 | July | Bea, Beatrice, Beatriz, Beattie, Marta, Martha, Olaf, Serafina, Trixie |
| Estonia | 30 | July | Kerman, Kermo, Roland |
| Italy | 31 | July | Ignazio di Loyola |
| Spain | 31 | July | Ignacio de Loyola |
| Lithuania | 9 | August | Mintartas, Rolandas, Romanas, Tarvile |
| Poland | 9 | August | Jan, Klarysa, Miłorad, Roland, Roman, Romuald |
| Sweden | 9 | August | Roland |
| Italy | 12 | August | Ercolano |
| Slovakia | 29 | August | Nikolaj, Nikola |
| Latvia | 30 | August | Alija, Alvis, Jolanta |
| Croatia | 10 | September | Nikola Tolentino, Pulherija, Lijepa |
| Spain | 10 | September | Nicolás de Tolentino |
| USA | 13 | September | Arlando, Milton, Orlando, Roland, Rolanda, Rolando, Stone, Stoney |
| Czechia | 15 | September | Jolana |
| France | 15 | September | Dolores, Roland |
| Slovakia | 15 | September | Jolana |
| USA | 15 | September | Delora, Delores, Dolores, Lola, Lolita |
| Croatia | 25 | September | Nikola of Flue, Aurelija, Kleofa, Firmin |
| Lithuania | 29 | September | Gabrielius, Michalina, Mykolas, Mykole, Rapolas |
| Italy | 30 | September | Girolamo |
| Latvia | 17 | October | Gaitis, Gaits, Karina, Karola, Vita |
| Latvia | 18 | October | Lukass, Rolands, Ronalds |
| Italy | 21 | October | Orsola |
| Lithuania | 24 | October | Daugailas, Gilbertas, Rapolas, Svitrigaile |
| Sweden | 29 | October | Viola |
| Austria | 9 | November | Herfried, Roland, Theodor |
| USA | 12 | November | Colan, Colin, Colleen, Collin, Cullan, Cullen, Culver, Kiley, Kyla, Kyle, Kylee, Kyleigh, Kyler, Kylier |
| Austria | 14 | November | Nikolaus, Sidonia |
| Croatia | 14 | November | Nikola Tavelic, Ivan Trogirski |
| Czechia | 20 | November | Nikola |
| Hungary | 20 | November | Jolán |
| Latvia | 24 | November | Velta, Viliberts, Viola |
| USA | 28 | November | Nola, Nolan, Nolana, Norton |
| Austria | 6 | December | Denise, Henrike, Nikolaus |
 Bulgaria | 6 | December | Nikola, Nikolai, Nina, Kolyo, Nenka, Niko, Nikolay, Nikolina, Nitza |
| Croatia | 6 | December | Nikola bikup, Nikša |
| Denmark | 6 | December | Nikolaus |
| Estonia | 6 | December | Nigulas, Nigul, Nikolai, Niilas, Niilo, Nils, Klaus, Laas, Laus |
| Finland | 6 | December | Niilo, Niko, Niki, Nikolas, Niklas, Nikolai, Niila |
| France | 6 | December | Nicolas |
 Greece | 6 | December | Nikolaos, Nicolas, Nikos, Nick, Nikoletta |
| Italy | 6 | December | Nicola |
| Latvia | 6 | December | Klavs, Niklavs, Nikolajs |
| Norway | 6 | December | Nikolai, Nils |
| Romania | 6 | December | Nicolae |
| Spain | 6 | December | Nicolás |
| Sweden | 6 | December | Niklas, Nikolaus |
 Ukraine | 6 | December | Nicholas |
| USA | 6 | December | Claus, Ira, Nicholas, Nichole, Nick, Nicklaus, Nickolas, Nico, Nicolas, Nicole, Nicolette, Nikki, Niko, Nikolas |
| Poland | 8 | December | Boguwola, Klement, Maria, Światozar, Wirginiusz |
| Croatia | 16 | December | Lazar, Izak, Jolanda, Florijan |
| Austria | 17 | December | Jolanda, Lazarus, Viviana |
| Lithuania | 17 | December | Drovyde, Jolanta, Mantgailas, Olimpija |
| Poland | 17 | December | Florian, Jolanta, Łazarz, Olimpia, Warwara, Żyrosław |
| Spain | 17 | December | Lázaro, Yolanda |
| Hungary | 19 | December | Viola |
| Estonia | 22 | December | Vambola, Vambo |
| Austria | 27 | December | Fabiola |
| France | 27 | December | Fabiola, Jean |
| Germany | 27 | December | Fabiola |
| Poland | 27 | December | Cezary, Fabia, Fabiola, Jan, Radomysł |