Is SIX open on Monday 21 May 2029?

No. SIX is closed on Monday 21 May 2029 for Whit Monday. It reopens on Tuesday 22 May 2029.

Whit Monday

Related markets on 21 May 2029

LSE	08:00–16:30
Xetra	09:00–17:30
Euronext Paris	09:00–17:30
NYSE	09:30–16:00
Nasdaq	09:30–16:00
TSX	Victoria Day
B3	10:00–18:00
TSE Tokyo	09:00–15:30
HKEX	The Buddha's Birthday (observed)
SSE	No data