Agda's name day is celebrated on February 5th in Sweden.
The name Agda is infrequently encountered in the USA, often perceived as carrying an old-world, classic resonance. Its historical roots lie primarily in Scandinavian and Germanic regions, though specific details on its global popularity are limited to these areas. The name carries an inherent mood of reserved elegance and quiet strength, setting it apart from more modern choices. In terms of gender, Agda is overwhelmingly and consistently classified as a female name worldwide. Its structure suggests connections to older concepts of richness or bounty, influencing its traditional character.
| Country | Day | Month | Names |
 Latvia | 20 | March | Irbe, Made, Magda, Magdalena |
 Norway | 11 | May | Magda, Malvin |
 Poland | 13 | May | Andrzej, Aron, Ciechosław, Gloria, Magdalena, Piotr, Robert, Roberta, Serwacy |
 Greece | 19 | May | Menandrios, Marylena, Magdalini, Patrick, Markella |
 Austria | 25 | May | Beda, Gregor, Magdalene |
| Poland | 25 | May | Epifan, Grzegorz, Imisława, Maria Magdalena, Urban |
| Poland | 27 | May | Beda, Izydor, Jan, Juliusz, Lucjan, Magdalena, Radowit |
 Lithuania | 29 | May | Algedas, Erdvile, Magdalena, Magde |
| Poland | 29 | May | Bogusława, Maksymilian, Maria Magdalena, Teodor, Teodozja |
| Poland | 1 | June | Alfons, Alfonsyna, Bernard, Fortunat, Gracjana, Hortensjusz, Jakub, Konrad, Konrada, Magdalena, Nikodem, Świętopełk, Symeon |
| Poland | 13 | June | Antoni, Chociemir, Herman, Lucjan, Maria Magdalena, Tobiasz |
| Poland | 27 | June | Maria Magdalena, Władysław, Władysława, Włodzisław |
| Poland | 16 | July | Andrzej, Benedykt, Dziersław, Dzierżysław, Eustachiusz, Eustachy, Faust, Maria Magdalena, Marika, Ostap, Ruta, Stefan |
| Poland | 17 | July | Aleksander, Aleksy, Andrzej, Bogdan, Dzierżykraj, Januaria, Julietta, Leon, Marceli, Marcelina, Maria Magdalena |
 Ukraine | 20 | July | Elias, Magdalyna |
| Austria | 22 | July | Maria Magdalena |
 Bulgaria | 22 | July | Lena, Magda, Magdalena, Manda, Meglena, Miglena |
 Croatia | 22 | July | Marija Magdalena |
 Czechia | 22 | July | Magdaléna |
 Denmark | 22 | July | Magdalene, Maria |
 Estonia | 22 | July | Magdaleena, Magda, Made, Madli, Malle, Mall, Leen, Leena, Leeni |
 Germany | 22 | July | Magdalena |
| Greece | 22 | July | Magdalini, Magda, Magdalena, Lena, Markella |
| Lithuania | 22 | July | Dalius, Magdalena, Mantile, Marija |
| Poland | 22 | July | Albin, Bolesława, Bolisława, Laurencjusz, Maria Magdalena, Milenia, Pankracy, Wawrzyniec, Więcemiła |
 Slovakia | 22 | July | Magdaléna |
 Spain | 22 | July | Teófila, Zoraida, Magdalena, Zaida, Primitiva |
 Sweden | 22 | July | Madeleine, Magdalena |
 USA | 22 | July | Amaya, Magda, Magdalen, Magdalena, Magdalene |
| Latvia | 23 | July | Ada, Madala, Magda, Magone |
| Denmark | 28 | November | Magdalene, Sophie |