Historical clue formulations

• Mournful peals — 2022-11-06
• Somber rings — 2022-06-30
• Mournful bell sounds — 2017-05-22
• Sounds of doom, maybe — 2016-06-18
• Mournful rings — 2013-01-20
• Sounds ominously — 2008-11-07
• Sounds ominously — 2007-05-25