May 31

May 31 is the 151st day of the year (152nd in leap years). 214 days remain until the end of the year.

Observances

• Anniversary of Royal Brunei Malay Regiment (Brunei)

• The beginning of Gawai Dayak (Dayaks in Sarawak, Malaysia and West Kalimantan, Indonesia)

• World No Tobacco Day

• Web Designer Day (US)

• National Utah Day (US)

• Infidelity Hurts Awareness Day (US)

• National Macaroon Day (US)

• National Smile Day (US)