The name Iga is celebrated on six distinct name days in Poland throughout the calendar year. These recognized dates include February 1, May 11, July 15, July 31, October 23, and December 15.
Iga is a historically significant feminine name, most popular in Poland where it serves as a formal version of the diminutive Jadwiga. Its origins trace back to Germanic elements signifying "battle" and "war," lending the name a strong and resilient meaning. While uncommon in the USA, Iga maintains a robust regional presence, appreciated for its short, two-syllable structure. The name's mood is concise and athletic, projecting a tone of determination and self-assurance. It is universally recognized as a female identifier, inheriting the gender classification of its ancient root.
| 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 |
 Romania | 2 | November | Achindin, Aftonie, Agapie, Elpidifor, Gavriil, Pigasie |
| 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 |