Historical clue formulations

• Something most people lose with age — 2022-10-01
• Something kids often lose — 2021-02-11
• Cute pudginess in a toddler — 2020-06-02
• Some lose it in their teens — 2014-05-15
• Some pudginess — 2011-12-25
• It's usually lost before reaching school age — 2007-05-05