Is B3 open on Monday 21 May 2029?

Yes

Yes. B3 is open on Monday 21 May 2029, trading from 10:00 to 18:00 GMT-3 (São Paulo time).

10:00–18:00 GMT-3

Regular hours

Related markets on 21 May 2029

NYSE	09:30–16:00
Nasdaq	09:30–16:00
TSX	Victoria Day
CME Equity	17:00^{−1 previous day}–16:00
LSE	08:00–16:30
Xetra	09:00–17:30
Euronext Paris	09:00–17:30
SIX	Whit Monday
TSE Tokyo	09:00–15:30
HKEX	The Buddha's Birthday (observed)