Justin: Name day
Name Day List: Justin
| Country | Day | Month | Names |
 Austria | 1 | June | Justin, Silvana, Simeon |
 Croatia | 1 | June | Marija, Justin, Malden |
 France | 1 | June | Justin, Ronan |
 Ukraine | 1 | June | Clara, Justin, Valerian |
 USA | 10 | November | Flora, Florence, Florian, Jocelina, Joceline, Jocelyn, Jocelyne, Jocelynn, Joselyn, Joslyn, Justice, Justin, Justina, Justine, Justus |
Name Day List - similar names (Justin)
| Country | Day | Month | Names |
| France | 12 | March | Justine, Pol |
 Denmark | 13 | April | Justinus |
 Latvia | 13 | April | Egils, Jagailis, Justins, Justs, Nauris |
 Lithuania | 14 | April | Justinas, Vaisvyde, Vaiva, Valerijonas, Visvaldas |
 Slovakia | 14 | April | Justína |
 Greece | 1 | June | Justine |
| Latvia | 16 | June | Justine, Juta |
| Austria | 31 | July | Hermann, Ignatius, Justinus |
 Sweden | 2 | September | Justina, Justus |
| Lithuania | 5 | September | Dingaile, Erdenis, Justina, Stanislova, Stase |
| Lithuania | 26 | September | Grazina, Juste, Justina, Kipras, Vydenis |
| Ukraine | 2 | October | Cyprian, Justina |
| Austria | 7 | October | Jörg, Justina, Rosa Maria |
| Lithuania | 7 | October | Butrimas, Eivina, Justina, Renatas |