Stefa's name day is observed on September 18th in Lithuania.
Stefa is an uncommon first name in the USA, usually recognized as a variant form linked to names denoting a crown. The name generally carries an elegant and slightly reserved mood, suggesting understated strength. While its precise history in America is undocumented, its linguistic structure points towards European origins. Stefa is classified almost exclusively as a female given name worldwide. It lacks the widespread usage necessary to establish a distinct American historical narrative.
| Country | Day | Month | Names |
 Lithuania | 2 | January | Fulgentas, Gailute, Marvydas, Stefanija |
| Lithuania | 11 | January | Audrius, Marcijonas, Stefanija, Vilne |
 Poland | 3 | February | Błażej, Hipolit, Hipolita, Laurencjusz, Maksym, Oskar, Stefan, Telimena, Uniemysł, Wawrzyniec |
| Poland | 8 | March | Beata, Filemon, Jan, Julian, Miligost, Miłogost, Stefan, Wincenty |
| Poland | 17 | April | Anicet, Innocenta, Innocenty, Jakub, Józef, Klara, Radociech, Robert, Roberta, Rudolf, Rudolfa, Rudolfina, Stefan |
 Latvia | 8 | May | Aiga, Ceronis, Inita, Stanislavs, Stefanija |
| Poland | 16 | July | Andrzej, Benedykt, Dziersław, Dzierżysław, Eustachiusz, Eustachy, Faust, Maria Magdalena, Marika, Ostap, Ruta, Stefan |
| Latvia | 2 | August | Norma, Normunds, Stefans |
| Poland | 2 | August | Alfons, Alfonsyna, Borzysława, Gustaw, Ilia, Karina, Maria, Stefan |
| Poland | 6 | August | Felicysym, Jakub, January, Sława, Stefan, Sykstus, Wincenty |
 Slovakia | 7 | August | Štefánia |
| Poland | 15 | August | Maria, Napoleon, Stefan, Stella, Trzebimir |
 Austria | 16 | August | Alfried, Rochus, Stefan |
 Italy | 16 | August | Stefano di Ungheria |
| Poland | 2 | September | Absalon, Bohdan, Czech, Czechasz, Czechoń, Czesław, Dersław, Dionizy, Eliza, Henryk, Julian, Stefan, Tobiasz, Wilhelm, Witomysł |
| Poland | 18 | September | Dobrowit, Irena, Irma, Józef, Ryszarda, Stefania, Tytus, Zachariasz |
| Poland | 7 | October | Amalia, Justyna, Marek, Maria, Rościsława, Stefan, Tekla |
 Czechia | 9 | October | Štefan, Sára |
| Poland | 10 | November | Andrzej, Lena, Leon, Ludomir, Nelly, Nimfa, Probus, Stefan |
 Hungary | 28 | November | Stefánia |
| Poland | 11 | December | Damazy, Daniela, Julia, Stefan, Waldemar, Wojmir |
 Denmark | 26 | December | Stefan |
| Italy | 26 | December | Stefano |
 Norway | 26 | December | Stefan, Steffen |
| Slovakia | 26 | December | Štefan |
 Sweden | 26 | December | Staffan, Stefan |
 USA | 26 | December | Esteban, Estefania, Estefany, Estevan, Stefan, Stefanie, Stephan, Stephanie, Stephany, Stephen, Steve, Steven, Stevie |
 Bulgaria | 27 | December | Venci, Vencislav, Vencislava, Zapryan, Sonya, Stamen, Stanimir, Stanka, Stefan, Stefana, Stefaniya, Stefka, Stoil, Stoimen, Stoichko, Stojko, Stoyan, Stoyanka, Tanya, Tsanka, Tsanko, Tsonka, Tsonyu |
 Greece | 27 | December | Stefanos, Stefania, Stephania, Stephan, Steven |