The text confirms that Ain's name day is observed on March 11th in Estonia.
The name Ain is exceedingly rare in the United States, lacking a significant historical presence in domestic naming trends. Its complex origin often links it to concepts of vision, clarity, or natural water sources across various linguistic traditions. Culturally, the name often defaults to a masculine identity, though its usage varies regionally and can be considered unisex elsewhere. The inherent mood of Ain is strong, concise, and intellectual, suggesting a reserved but sophisticated personality. This short name thus offers a unique combination of ancient roots and a powerful, minimalist tone.
| Country | Day | Month | Names |
 France | 6 | January | Balthazar, Mélaine, Melchior, Tiffany |
 USA | 12 | January | Alain, Alaina, Alan, Alana, Alanna, Alayna, Allan, Allen, Allena, Lana, Lanna |
 Austria | 14 | January | Engelmar, Felix, Rainer |
| USA | 16 | January | Aaliyah, Aleah, Aliyah, Paine, Payne, Phillis, Phyllis, Pilar, Priscilla |
 Lithuania | 17 | January | Beatrice, Dovainis, Leonile, Vilda |
| USA | 28 | January | Carlotta, Charleen, Charlene, Charlotta, Charlotte, Charmaine, Manfred |
 Finland | 8 | February | Laina |
 Estonia | 17 | February | Väino, Väinu, Salmo |
| Finland | 17 | February | Väinö, Väinämö, Karita, Rita |
| Finland | 18 | February | Kaino |
| France | 28 | February | Romain |
| Lithuania | 4 | March | Daina, Daugvydas, Kazimieras, Vaclava |
| Lithuania | 1 | April | Dainora, Rimgaudas, Teodora |
 Latvia | 12 | April | Ainis, Julijs |
| USA | 13 | April | Thom, Thomas, Thomasina, Thompson, Tom, Tomas, Tommie, Tommy, Twain |
| Latvia | 29 | April | Laine, Raimonds, Vilnis |
| France | 4 | May | Florian, Sylvain |
| Finland | 5 | May | Maini, Melina, Melissa |
| Estonia | 10 | May | Aino, Aina, Aini, Ainu, Ainike |
| Finland | 10 | May | Aina, Aini, Aino, Ainikki |
| France | 28 | May | Germain |
| France | 30 | May | Ferdinand, Jeanne, Lorraine |
 Russia | 31 | May | Alexandra, Faina, Julia |
| USA | 8 | June | Cain, Caine, Calliope, Genesis, Jewel, Kane, Kanye, Kayne, Opal |
 Spain | 9 | June | Blanca, Primo, Feliciano, Diana, Efraín |
| Latvia | 13 | June | Ainars, Tautvaldis, Tobijs, Uva, Zigfrids, Zigrids |
 Sweden | 13 | June | Aina, Aino |
| France | 15 | June | Germaine |
| USA | 15 | June | Alice, Alicia, Alisa, Alisha, Alison, Alissa, Allie, Allison, Allyson, Alyce, Alyse, Alysha, Alysia, Alyson, Alyssa, German, Germain, Germaine, Jermaine, Vidal, Vito |
 Poland | 17 | June | Adolf, Adolfa, Adolfina, Agnieszka, Alf, Drogomysł, Franciszek, Laura, Marcjan, Radomił, Rainer, Wolmar |
| USA | 18 | June | Effie, Efrain, Eph, Ephraim, Marina, Marnie, Nevaeh |
| USA | 23 | June | Audra, Audrey, Dashawn, Deshawn, Elton, Ethel, Josiah, Josias, Shaina, Shania, Shaun, Shauna, Shawn, Shawna, Shayna, Shayne, Shonda |
| Estonia | 26 | June | Manivald, Vanevald, Vane, Vaane, Vaano, Vaino |
 Norway | 27 | June | Aina, Ina, Ine |
| Lithuania | 10 | July | Amalija, Eirime, Gilvainas |
| Estonia | 15 | July | Ragne, Raina, Raine, Raini |
| Latvia | 17 | July | Ainars, Aleksejs, Aleksis |
| USA | 23 | July | Roma, Roman, Romaine, Romana, Romelia, Romeo, Romina, Seymour |
| Austria | 4 | August | Johannes, Rainer |
 Germany | 4 | August | Rainer |
| Estonia | 6 | August | Laine, Laina, Lainela, Laini, Laive, Laivi |
| Lithuania | 8 | August | Daina, Domas, Dominykas, Elidijus, Gustavas, Taulgirdas |
| USA | 10 | August | Herb, Herbert, Herbie, Heriberto, Larry, Laura, Laurean, Laurel, Lauren, Laurence, Laurie, Lauryn, Lawrence, Lora, Loren, Lorena, Lorenzo, Loretta, Lori, Lorraine |
| Austria | 18 | August | Claudia, Helena, Rainaki |
| USA | 18 | August | Aileen, Eileen, Elaina, Elaine, Eleanor, Elena, Eliana, Ella, Elle, Ellen, Ellie, Helen, Helena, Iliana, Lena, Leonora, Nell, Nellie, Nelly |
| Finland | 5 | September | Mainio, Roni |
| USA | 7 | September | Raegan, Raina, Rana, Rani, Reagan, Regan, Regina, Regine, Yale |
| France | 9 | September | Alain, Omer |
| Lithuania | 20 | September | Eustrachijus, Fausta, Tautgirde, Vainoras |
| Estonia | 1 | October | Reinhard, Rainer, Rain, Raino, Ragnar, Rauno |
| Finland | 1 | October | Raine, Rainer, Rauno |
| Latvia | 8 | October | Aina, Anastasija, Aneta, Anita |
| France | 10 | October | Ghislain, Virgile |
| Finland | 13 | October | Taija, Taina, Tanja |
| Latvia | 16 | October | Daiga, Daigone, Dainida, Egils |
| Finland | 17 | October | Saana, Saini, Saaga |
| USA | 18 | October | Blaine, Blair, Blane, Luca, Lucas, Lukas, Luke, Wynn, Wynton |
| Latvia | 23 | October | Daina, Dainis, Severins |
| France | 1 | November | Toussaint |
| Lithuania | 3 | November | Hubertas, Narvaine, Silvija, Vydmantas |
| USA | 5 | November | Perdita, Tiara, Tiera, Tierra, Swain, Swana |
 Bulgaria | 8 | November | Angel, Angelina, Arhangel, Gavrail, Gavril, Emil, Emilia, Emiliana, Mihaela, Mihail, Ognyan, Ognyana, Plamen, Plamena, Rada, Radka, Radko, Rafail, Raia, Raika, Raina, Rangel, Emiliya, Emiliyana, Emiliyan, Lina, Mila, Milen, Milyo, Mihaela, Mihail, Radivoy, Radoslav, Radoslava, Radostin, Radostina, Raiko, Raycho, Rangel, Rafail, Raya, Rusi |
| Lithuania | 19 | November | Dainotas, Matilda, Rimdauge |
| Lithuania | 30 | November | Andriejus, Andrius, Dovaine, Saugardas |
| Lithuania | 4 | December | Barbora, Liugaile, Vainotas |
| Lithuania | 12 | December | Dagmara, Gilmintas, Vaingede |
| Lithuania | 14 | December | Alfredas, Kintvile, Tarvainas |
| France | 19 | December | Urbain |
| Latvia | 26 | December | Dainuvite, Gija, Saulvedis |
| Lithuania | 29 | December | Gaja, Gentvainas, Teofile |
| Poland | 30 | December | Dawid, Dawida, Dionizy, Eugeniusz, Irmina, Katarzyna, Łazarz, Rainer, Sabin, Sewer, Uniedrog |
| USA | 30 | December | Ainsley, Kelsa, Kelsey, Kelsi, Kelsie, Mason |