The name Ola has Name Days celebrated on April 19 in Sweden and July 29 in Norway.
The name Ola is highly diverse, functioning as a masculine short form of Olav in Scandinavia, meaning "ancestor's relic," and a feminine diminutive of Aleksandra or Olga in Slavic cultures, suggesting "defender of mankind" or "holy." In the USA, it serves as a simple, highly recognizable international choice utilized across communities including Nordic, Polish, and West African demographics. Historically, its brief nature allowed for easy global adoption. Ola is generally considered unisex internationally due to its regional variations. The name projects a mood that is concise, strong, and highly versatile.
| 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 |
| 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 |
 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 |
| 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 |
| 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 |