Pat's name day is celebrated on March 17th in the USA.
Pat is a widely recognized nickname, primarily in the USA, Canada, Australia, and the UK, derived from names like Patrick and Patricia. Its history is rooted in the tradition of creating affectionate diminutives, stemming from Latin and Roman origins. The name is overwhelmingly unisex, though historically leaning slightly masculine, and is known for its approachable and friendly vibe. It evokes a sense of practicality and down-to-earthness, suggesting a reliable personality. Pat’s simplicity and adaptability contribute to its enduring popularity across generations.
| Country | Day | Month | Names |
 Czechia | 19 | February | Patrik |
 Norway | 5 | March | Patricia, Patrick |
 Spain | 13 | March | Patricia, Rodrigo, Ramiro |
 Italy | 14 | March | Patrizia |
 Austria | 17 | March | Gertrud, Gertraud, Patrick |
 Croatia | 17 | March | Patrik, Domagoj, Hrvatin |
 France | 17 | March | Patrice, Patrick |
 Germany | 17 | March | Patrick |
 Hungary | 17 | March | Gertrúd, Patrik |
 Lithuania | 17 | March | Gendvilas, Gertruda, Patrikas, Varuna, Vyte |
 Poland | 17 | March | Gertruda, Harasym, Jan, Patrycjusz, Patryk, Regina, Rena, Zbigniew, Zbygniew, Zbyszko |
| Spain | 17 | March | Patricio |
| Italy | 18 | March | Patrizio |
| Poland | 20 | March | Aleksander, Aleksandra, Ambroży, Anatol, Bogusław, Cyriaka, Eufemia, Klaudia, Patrycjusz, Ruprecht, Wasyl, Wincenty |
 Greece | 31 | March | Ypatios |
 Romania | 31 | March | Denia, Ipatie |
 Finland | 16 | April | Jalo, Patrik |
| Poland | 16 | April | Benedykt, Bernadetta, Cecyl, Cecylian, Charyzjusz, Erwin, Erwina, Julia, Ksenia, Lambert, Lamberta, Nikita, Nosisław, Patrycy, Urban |
 Sweden | 16 | April | Patricia, Patrik |
| Romania | 28 | April | Iason, Sosipatru |
| Greece | 29 | April | Sosipatros, Jason |
 USA | 1 | May | Mae, May, Patience, Sigmund, Sigmunda |
| Greece | 19 | May | Menandrios, Marylena, Magdalini, Patrick, Markella |
| Romania | 19 | May | Patrichie |
| Romania | 3 | June | Claudie, Dionisie, Ipatie, Luchilian, Paul |
| Romania | 18 | June | Ipatie, Leontie, Teodul |
| Czechia | 2 | July | Patricie |
 Slovakia | 6 | July | Patrícia, Patrik |
| Poland | 9 | July | Anatolia, Heloiza, Hieronim, Łucja, Lucja, Ludwika, Lukrecja, Mikołaj, Patrycjusz, Weronika, Wszebąd, Zenon, Zenona |
| Croatia | 11 | July | Benedikt opat, Olga, Oliver |
| Croatia | 25 | August | Ljudevit IX., Josip Kalasancijski, Patricija |
| Hungary | 25 | August | Lajos, Patrícia |
| Lithuania | 28 | August | Augustinas, Patricija, Steigvile, Tarvilas |
| Poland | 28 | August | Adelina, Aleksander, Aleksy, Augustyn, Patrycja, Sobiesław, Stronisław |
| Spain | 11 | September | Patiens |
| USA | 11 | September | Patriot Day |
| Poland | 25 | September | Aureli, Aurelia, Aurelian, Franciszek, Gaspar, Herkulan, Kamil, Kleofas, Kleopatra, Ładysław, Piotr, Rufus, Świętopełk, Wincenty, Władysław, Władysława, Włodzisław |
| Greece | 19 | October | Kleopatra, Cleo |
| Lithuania | 19 | October | Geisvilas, Kantrime, Kleopatra, Laura |
| USA | 19 | October | Cleo, Cleon, Cleopatra, Howard, Howie |
| Poland | 20 | October | Budzisława, Irena, Jan Kanty, Kleopatra, Wendelin, Witalis |
| Romania | 10 | November | Cuart, Erast, Olimp, Rodion, Sosipatru |
| Croatia | 5 | December | Saba opat., Kristina, Sabina |
| Greece | 8 | December | Patapios |
| Romania | 8 | December | Patapie |