Iga has name days on February 1, May 11, July 15, July 31, October 23, and December 15 in Poland.
Iga is a rarely encountered given name in the United States, making it quite distinctive. Its origins are primarily Slavic, often linked to a meaning of "high" or "noble." The name carries a soft yet strong impression, evoking a sense of quiet resilience and grace. Predominantly a feminine name, Iga might appeal to parents seeking a less common, elegant choice with European roots. Its rarity lends it an air of understated sophistication.
| Country | Day | Month | Names |
 Poland | 1 | February | Bryda, Brygida, Dobrocha, Dobrochna, Iga, Ignacja, Ignacy, Paweł, Siemirad, Żegota |
| Poland | 11 | May | Adalbert, Benedykt, Filip, Franciszek, Iga, Ignacja, Ignacy, Lew, Lutogniew, Mamert, Mira, Żegota |
| Poland | 15 | July | Daniel, Dawid, Dawida, Egon, Henryk, Iga, Ignacja, Ignacy, Lubomysł, Niecisław, Włodzimierz, Żegota |
| Poland | 31 | July | Beatus, Demokryt, Emilian, Ernesta, Ernestyna, Helena, Iga, Ignacja, Ignacy, Justyn, Ludomir, Żegota |
| Poland | 23 | October | Iga, Ignacja, Ignacy, Jan, Marlena, Odilla, Roman, Seweryn, Teodor, Włościsław, Żegota |
| Poland | 15 | December | Celina, Fortunata, Iga, Ignacja, Ignacy, Krystiana, Nina, Walerian, Waleriana, Wolimir, Żegota |
| Country | Day | Month | Names |
 Lithuania | 6 | March | Karigaile, Novilas, Raminta, Roze |
 Estonia | 11 | March | Ain, Ainar, Aigar, Innar, Inno |
| Lithuania | 12 | March | Darmante, Galvirdas, Grigalius |
| Lithuania | 14 | March | Darmantas, Karigaile, Matilda |
| Lithuania | 23 | March | Akvile, Alfonsas, Galigantas, Vismante |
 Latvia | 18 | April | Dana, Hildegarde, Jadviga, Laura, Nameisis |
| Latvia | 8 | May | Aiga, Ceronis, Inita, Stanislavs, Stefanija |
| Lithuania | 9 | May | Austeja, Edita, Grigalius, Mingailas |
| Latvia | 15 | May | Arita, Saulnesis, Sofija, Taiga |
 Denmark | 30 | May | Vigand |
| Latvia | 4 | June | Elfrida, Frederika, Gaigala, Sintija |
 USA | 4 | June | Cora, Coral, Coretta, Corey, Cori, Corina, Corine, Corinne, Corrigan, Corrin, Cory, Homer, Kori, Korey, Korin, Korrigan, Kory |
| Latvia | 23 | June | Liga, Ligita, Ligonis |
| Latvia | 25 | June | Maiga, Milija |
| Latvia | 9 | July | Asne, Tusnelda, Zaiga |
| Lithuania | 16 | July | Danguole, Faustas, Vaigaudas |
| Lithuania | 17 | July | Aleksas, Darius, Girenas, Vaiga |
| Lithuania | 19 | July | Aura, Aureja, Galigantas, Mantigaile, Vincas, Vincentas |
| Latvia | 29 | August | Aiga, Aigars, Armins, Vismants |
| Latvia | 31 | August | Aigars, Aira, Labite, Vilma |
| Lithuania | 11 | September | Augantas, Gytaute, Gyte, Heiga |
| Poland | 13 | September | Aleksander, Aureliusz, Eugenia, Filip, Lubor, Materna, Morzysław, Szeliga |
| Latvia | 15 | October | Eda, Ede, Hedviga, Jadviga |
| Poland | 15 | October | Brunon, Gościsława, Jadwiga, Sewer, Tekla, Teresa |
| Latvia | 16 | October | Daiga, Daigone, Dainida, Egils |
 Slovakia | 17 | October | Hedviga |
| Lithuania | 24 | October | Daugailas, Gilbertas, Rapolas, Svitrigaile |
| Lithuania | 25 | October | Darija, Inga, Svitrigaila, Vaigede |
 Austria | 26 | October | Albin, Amand, Wigand |
| USA | 22 | November | Abbey, Abbie, Abby, Abigail, Cecelia, Cecil, Cecilia, Cecily, Cecyl, Celia, Gael, Gail, Galen, Gay, Gayle, Philemon, Philo, Shayla, Sheila |
| Poland | 1 | December | Długosz, Edmund, Eliga, Eligiusz, Iwa, Natalia, Natalis, Platon, Sobiesława |
| Latvia | 29 | December | Ileana, Ilgona, Ilgone, Solveiga |
