Historical clue formulations

• Sounds from baby robins — 2026-03-03
• Responsibility for a social media manager — 2023-12-28
• Some brief updates — 2022-01-15
• Responsibility for a social media manager — 2018-05-22
• 140-character messages — 2017-03-20
• Messages with hashtags — 2017-03-01
• 140-character messages — 2015-07-13
• Messages limited to 140 characters — 2013-11-18
• 140-characters-or-fewer messages — 2013-04-03
• Chirps — 2008-07-17
• Bird calls — 1997-01-05