Day of Republika Srpska
| Day of the Republic | |
|---|---|
| Official name | Proclamation of Serb Republic of Bosnia and Herzegovina |
| Also called | Saint Stephen's Day |
| Observed by | Republika Srpska |
| Date | January 9 |
| Next time | 9 January 2027 |
| Frequency | annual |
Day of Republika Srpska (Serbian: Дан Републике Српске, romanized: Dan Republike Srpske) is a formerly official national holiday of the Republika Srpska, which has been proclaimed unconstitutional by the Constitutional Court of Bosnia and Herzegovina. The holiday is celebrated on 9 January, and its unofficial patron saint is Saint Archdeacon Stephen—historically being patron saint of medieval Kotromanić dynasty kings bearing their first name after him—which falls on the same day.