Historical clue formulations

• Neighbor of Mozambique — 2021-08-15
• African nation whose name consists of three U.S. state postal abbreviations — 2019-09-23
• Country whose name consists of three consecutive state postal abbreviations — 2018-12-16
• "The Warm Heart of Africa" — 2017-08-26
• Nyasaland, today — 2017-04-19
• Nyasaland, today — 2014-11-23
• African land whose name consists of three state postal abbreviations — 2013-09-23
• African country with a namesake lake — 2012-11-24
• Nyasaland, now — 2012-09-04
• Chichewa and English are its two official languages — 2008-05-31
• Lake ___, third-largest lake in Africa — 2008-02-03
• Nyasaland, now — 2004-07-20
• Neighbor of Zambia — 2002-04-15
• Nyasaland, today — 2002-04-05
• Lilongwe is its capital — 2001-04-27
• Nyasaland, now — 1996-08-17