Is IDX open on Friday 31 January 2014?

No. IDX is closed on Friday 31 January 2014 for Lunar New Year. It reopens on Monday 3 February 2014.

Lunar New Year

Related markets on 31 Jan 2014

TSE Tokyo	09:00–15:00
HKEX	Chinese New Year
SSE	Chinese New Year (Spring Festival)
KRX	Seollal (New Year's Day by the lunar)
NSE	09:15–15:30
SGX	Chinese New Year
ASX	10:00–16:00
NYSE	09:30–16:00
Nasdaq	09:30–16:00
TSX	09:30–16:00