Do not treat “Southeast Asia” as one holiday calendar. Singapore’s multicultural gazetted days, Thailand’s Songkran, Vietnam’s Tết factory pause, and Indonesia’s Nyepi vs Eid logistics shocks hit different nodes.
- Singapore — Chinese New Year plus moving faith holidays
- Thailand — Songkran business slowdown
- Vietnam — Tết manufacturing stoppage
- Indonesia — Nyepi on Bali; Eid mudik elsewhere
Write holiday delay clauses into contracts and lock freight two weeks early.