Marga's name day is celebrated on March 8 in Latvia.
Marga, primarily a short form of Margaret, holds varying popularity globally, more common in parts of Europe than in the United States as a first name. Historically, it emerged as a concise alternative to the longer form, which traces its origin to the Greek word for "pearl." The name is strongly feminine in usage worldwide, consistently used for girls and women. Marga evokes a sophisticated and punchy mood, feeling both confident and modern due to its short form. This makes it a name that balances classic roots with a contemporary feel.
| Country | Day | Month | Names |
 Greece | 25 | January | Grigorios, Gregory, Margarita |
 Lithuania | 22 | February | Darvydas, Elvinas, Gintaute, Margarita |
 Spain | 22 | February | Margarita, Leonor |
 Ukraine | 27 | February | Margaret |
| Lithuania | 10 | April | Agna, Apolonijus, Margarita, Mintautas |
 Bulgaria | 12 | April | Vencislav, Vencislava, Violeta, Varban, Girgin, Girgina, Dilyan, Dilyana, Zdravka, Zdravko, Latinka, Lilyana, Margarita, Nevena, Roza, Rosen, Rosica, Trendafil, Trendafilka, Tsvetan, Tsveta, Tsvetanka, Tsviatko, Tseno, Stanislav, Stanislava |
 Croatia | 10 | June | Margareta, Dijana, Bl. Ivan Dominici |
| Lithuania | 10 | June | Galindas, Margarita, Vingaile, Zybartas |
 Slovakia | 10 | June | Margaréta |
 USA | 10 | June | Daisy, Greta, Gretchen, Madge, Maggie, Margaret, Margarita, Margot, Marguerite, Marjorie, Meagan, Meg, Megan, Meghan, Peggy, Rita |
 Estonia | 13 | July | Margareeta, Margit, Mareta, Maret, Marita, Marit, Marge, Mare, Meeta, Greta, Grete, Kreet, Kreeta, Reet, Reeda |
 Latvia | 13 | July | Alda, Margarita, Margrieta, Mariska, Perle |
 Austria | 20 | July | Apollinaris, Bernhard, Margaretha |
 Finland | 20 | July | Marketta, Maarit, Maaret, Margareeta, Reeta, Reetta |
 Germany | 20 | July | Margarete |
 Norway | 20 | July | Margareta, Margit, Marit |
 Sweden | 20 | July | Greta, Margareta |
 Russia | 30 | July | Margarita, Marina |
| Greece | 1 | September | Simeon, Ourania, Penelope, Joshua, Mando, Clea, Aspasia, Antigoni, Margaret, Athina |
| Austria | 16 | October | Gallus, Hedwig, Margareta |
| Croatia | 16 | October | Margareta Marija Alacoque |
| Lithuania | 16 | October | Ambraziejus, Dovalde, Gutautas, Jadvyga, Margarita |
| Spain | 16 | October | Margarita, María Alacoque |
| Austria | 2 | November | Angela, Margarethe, Tobias |
| Austria | 16 | November | Margareta, Otmar |
| Croatia | 16 | November | Margareta Škotska kr. |
| Spain | 16 | November | Edmundo, Margarita |