18 maggio 1920

• Flag and Universities' Day (Haiti)
  18 maggio
• International Museum Day
  18 maggio

18 maggio 1920 is the 139^th day of the year 1920 in the Gregorian calendar.
The day of the week is Tuesday. There are 227 days remaining until the end of this year.
Chinese New Year 1920 will be from 20 febbraio to 5 marzo,
Muslim New Year - 14 settembre,
Jewish New Year, or Rosh Hashanah - from 13 settembre to 14 settembre.