Is TWSE open on Thursday 1 January 2015?
No
No. TWSE is closed on Thursday 1 January 2015 for New Year's Day. It reopens on Monday 5 January 2015.
New Year's Day
See also TWSE hours today and TWSE holidays 2015
TSE Tokyo
HKEX
SSE
KRX
NSE
SGX
ASX
NYSE
TSX