- Euroregional Days of Fortified Sites: in April.
- European Days of Crafts: in April.
- Meeting at the Gardens: in May-June.
- National Days of Archeology: in June.
- Weekend of the Heritage of Country and Mills: in June.
- The Watchers of Light, Festival of Sacred Art Contemporary: in June. For two weeks, in June, painters, sculptors, illuminators, poets, musicians and choristers transformed the cathedral of Saint-Omer into a real sanctuary of Sacred Contemporary Art.
- Open Golf: in June.
- Nautical procession in the Faubourg du Haut Pont: every last Sunday of July.
- "Nocturnes at the Countess" at the museum Sandelin Hotel: a weekend in July or August.
- European Heritage Days: in September.
- Saint-Omer, vegetable capital: every 1st weekend of October.
- Feast of science: in October.
February 2025 in Dunkerque