The 0.35 Ls stamp was issued in 2010 to celebrate 20 years of Declaration of May 4th, 1990.
In the second half of 1980s Soviet leader Mikhail Gorbachev started to introduce political and economic reforms in the Soviet Union, called glasnost and Perestroika. In the summer of 1987 the first large demonstrations were held in Riga at the Freedom Monument- a symbol of independence. In the summer of 1988 a national movement, coalescing in the Popular Front of Latvia, was opposed by the Interfront. The Latvian SSR, along with the other Baltic Republics was allowed greater autonomy, and in 1988 the old pre-war Flag of Latvia was allowed to be used, replacing the Soviet Latvian flag as the official flag in 1990.
In 1989, the Supreme Soviet of the USSR adopted a resolution on the "Occupation of the Baltic states", in which it declared that the occupation was "not in accordance with law," and not the "will of the Soviet people". Pro-independence Popular Front of Latvia candidates gained a two-thirds majority in the Supreme Council in the March 1990 democratic elections. On May 4, 1990, the Supreme Soviet of the Latvian SSR adopted the Declaration On the Restoration of Independence of the Republic of Latvia, Latvian SSR was renamed Republic of Latvia.