The issue of 12 December 2003 commemorates the "40 years of Independence 1963-2003".

After Kohlberg's body was recovered and his death confirmed, former students and colleagues published special issues of scholarly journals to commemorate his contribution to developmental psychology.

A subsequent issue commemorated the beginning of the Republic of India on 26 January 1950.

In 1957, a special issue of Fertility and Sterility - Volume 8, number 6 - commemorated his 75th birthday.

The following year, a joint issue of the same countries commemorated the pope's return visits to Poland.

The first pictorial issue in 1894 commemorated the 500th anniversary of Henry the Navigator's birth.

In 1924, the first literary issue commemorated the birth of epic poet Luís de Camões in 1524.

Special issue commemorating 100th anniversary of Russell's "On Denoting" Oxford University Press, 2005.

The 1948 general issue commemorated the third anniversary of the liberation.

A second issue, in 1921, commemorated the same occasion with a completely different design, with George V in the centre and various symbols in the corners.