Letter Rate 15¢ Package Rate 15¢ Postcard Rate 10¢ Effective 5/29/1978 Israel 8/14/1980 Workers Strike in Poland Workers at the Lenin Shipyard in Gdansk, Poland went on strike. About 17,000 workers skip work beginning the Solidarnosc (Solidarity) movement started by Lech Walesa. American President Jimmy Carter (1/20/1977-1/20/1981) British Prime Minister Margaret Thatcher (5/4/1979-11/28/1990) German President Karl Carstens (7/1/1979-6/30/1984)