4 agosto 1991

• Railway Workers' Day (Russia)
  4 agosto
• Constitution Day ()
  4 agosto

4 agosto 1991 is the 216^th day of the year 1991 in the Gregorian calendar.
The day of the week is Sunday. There are 149 days remaining until the end of this year.
Chinese New Year 1991 will be from 15 febbraio to 1 marzo,
Muslim New Year - 13 luglio,
Jewish New Year, or Rosh Hashanah - from 9 settembre to 10 settembre.