National and Public holidays in each country may affect Southeast Asia (SEA) carrier operations, potentially causing delays in shipment deliveries.
NATIONAL HOLIDAYS:
May 01 Labour Day
KH – Cambodia
ID – Indonesia
LA – Laos
MY – Malaysia
MM – Myanmar
PH – Philippines
SG – Singapore
VN – Vietnam
May 02 National Reunification Day (observed)
VN – Vietnam
May 03 Labour Day (observed)
VN – Vietnam
May 04 Coronation Day
TH - Thailand
May 05 Substitute for Coronation Day
TH - Thailand
May 09 Royal Ploughing Day
TH - Thailand
May 11 Visak Bochea Day/Visakha Bucha Day
KH – Cambodia
TH - Thailand
May 12 Visak Day
SG – Singapore
See this link for SingPost's Domestic & International network delays.