Irina: Name day
Name Day List: Irina
| Country | Day | Month | Names |
 Austria | 1 | April | Hugo, Irene, Irina |
 Finland | 5 | April | Irene, Irina, Ira, Iro |
 USA | 5 | April | Chandra, Ethelburga, Irene, Irina, Tyler, Tylor |
 Russia | 29 | April | Irina |
 Bulgaria | 5 | May | Irina, Mira, Irena, Miroslav, Miroslava |
 Latvia | 13 | May | Ina, Ira, Iraida, Irena, Irene, Irina, Miervalda |
| Russia | 14 | May | Irina |
 Poland | 18 | May | Aleksander, Aleksandra, Alicja, Edwin, Eryk, Eryka, Feliks, Irina, Liboriusz, Myślibor, Wenancjusz |
| Russia | 1 | October | Ariadna, Irina, Sofya |
| Austria | 20 | October | Ira, Irina, Vitalis, Wendelin |
Name Day List - similar names (Irina)
Czechia 
Lithuania 
Greece