From the “World days” package International Museum Day 18 May, International Museum Day as designated by the International Council of Museums Historical confidence: Attested In nearby years 1403 Saturday 29 Ordibehesht 1403 18 May 2024 1404 Sunday 28 Ordibehesht 1404 18 May 2025 1405 Monday 28 Ordibehesht 1405 18 May 2026 1406 Tuesday 28 Ordibehesht 1406 18 May 2027 1407 Thursday 29 Ordibehesht 1407 18 May 2028 Other occasions in this package New Year's DayValentine's DayInternational Women's DayPi DayEarth HourApril Fools' DayWorld Health DayEarth Day