Historical clue formulations

• Rang up — 2023-07-22
• Used a rotary phone — 2022-06-13
• Used an old phone — 2020-07-21
• Rang — 2020-05-09
• Used a rotary phone — 2016-02-15
• Got on the horn — 2010-11-27
• Called — 1996-06-16