1998-12-02: Christmas 1998

1998-11-11: Greeting stamps

1998-10-26: 50th Anniversary of Universal Declaration of Human Rights

1998-09-29: 100th Anniversary of the Birth of Christo Smirnenski

1998-09-24: Butterflies (1998)

1998-09-22: 90th Anniversary of Proclamation Bulgaria's Independence

1998-09-14: 100th Anniversary of the Birth of Dimitar Talev

1998-07-14: International Year of the Ocean

1998-07-07: Helicopters

1998-06-23: World exposition EXPO 1998, Lisbon-Portugal

1998-06-23: EXPO '98, Lisbon

1998-06-10: FIFA World Cup 1998 - France

1998-05-25: Cats (1998)

1998-05-15: Sport

1998-04-29: Winter Olympic Games 1998 - Nagano

1998-04-27: Europa (C.E.P.T.) 1998 - Feasts and Festivals

1998-04-24: Multi-country Program PHARE for Telecommunications and Posts

1998-03-30: Olympic Committee of Bulgaria, 75th Anniversary

1998-03-27: Easter 1998

1998-02-27: 120th Anniversary of Bulgaria's Liberation from Turkey

1998-02-24: Children's Book Illustrations

1998-01-06: Anniversary