Zénó's name day is December 22 in Hungary.
Zénó is a traditionally masculine given name with deep roots stemming from the ancient Greek name Zenon, implying a meaning tied to the deity Zeus. While highly uncommon in the USA, it retains significant cultural recognition in Central Europe, particularly in Hungary. The name carries an intellectual and strong mood, characterized by an air of historical elegance and sophistication. Historically, the name's variations have been associated with classical philosophy and tradition across the Mediterranean and European regions. As a rare and refined choice, Zénó consistently maintains its classification as a male identity globally.
| Country | Day | Month | Names |
 Ukraine | 30 | January | Gregory, Zenon, Zenonia, Zenia |
 Poland | 14 | February | Adolf, Adolfa, Adolfina, Alf, Cyryl, Dobiesława, Dobisława, Józef, Józefa, Konrad, Konrada, Krystyna, Lilian, Liliana, Mikołaj, Niemir, Niemira, Walenty, Zenon, Zenona |
 Lithuania | 5 | April | Irena, Rimvydas, Zenius, Zenonas, Zyginte |
 Austria | 12 | April | Herta, Julius, Zeno |
 Italy | 12 | April | Zenone |
| Poland | 12 | April | Andrzej, Iwan, Juliusz, Siemiodrog, Wiktor, Wiktoriusz, Zenon, Zenona |
 Spain | 12 | April | Andrés, Damián, Julio, Zenón |
| Lithuania | 23 | June | Arvydas, Vaida, Vanda, Zenonas |
| Poland | 23 | June | Agrypina, Albin, Bazyli, Józef, Piotr, Prosper, Wanda, Zenon, Zenona |
| Poland | 9 | July | Anatolia, Heloiza, Hieronim, Łucja, Lucja, Ludwika, Lukrecja, Mikołaj, Patrycjusz, Weronika, Wszebąd, Zenon, Zenona |
| Poland | 3 | September | Antoni, Bartłomiej, Bazylissa, Bronisław, Bronisz, Erazma, Eufemia, Eufrozyna, Izabela, Jan, Joachim, Joachima, Manswet, Mojmir, Szymon, Wincenty, Zenon, Zenona |
| Poland | 30 | October | Alfons, Alfonsyna, Angel, Angelus, Edmund, Klaudiusz, Przemysław, Sądosław, Zenobia |
 USA | 30 | October | Arilda, Xena, Xenia, Ximena, Zena, Zenas, Zenia, Zeno, Zenobia |
| Lithuania | 8 | December | Gedminte, Guntilda, Vaidginas, Zenonas |
 Croatia | 21 | December | Honorat, Caslav, Zenon |
| Lithuania | 22 | December | Dobile, Gedvydas, Ksavera, Zenonas |
| Poland | 22 | December | Beata, Drogomir, Flawian, Franciszka, Gryzelda, Honorata, Ksawera, Ksaweryna, Zenon, Zenona |
| Poland | 24 | December | Ada, Adam, Adamina, Adela, Ewa, Ewelin, Ewelina, Godzisława, Grzegorz, Grzymisława, Hermina, Herminia, Irma, Irmina, Zenobiusz |
Hungary