Historical clue formulations

• Ring-shaped coral reef — 2026-07-13
• Tropical ring — 2026-05-09
• Reef around a lagoon — 2026-03-23
• Part of Micronesia — 2026-03-11
• One of 32 in the country of Kiribati — 2025-11-29
• Key ring? — 2025-08-14
• Lagoon-forming landform — 2024-04-02
• Many a Coral Sea island — 2023-12-29
• Ring-shaped coral island — 2023-09-18
• Ring-shaped reef — 2023-08-07
• Ring-shaped reef — 2023-06-18
• Key ring? — 2023-05-19
• Coral arrangement — 2023-04-28
• Ring-shaped island — 2023-03-28
• Coral islet chain — 2023-01-09
• Island like Kiritimati — 2022-05-11
• Ring around a lagoon — 2022-04-27
• Volcanic vestige — 2022-03-10
• Bikini, e.g. — 2021-07-14
• Remnant of an oceanic volcano — 2020-12-09
• Island with a lagoon — 2019-11-04
• Island with a lagoon — 2019-09-30
• Island with a reef — 2019-09-23
• Coral formation — 2019-07-14
• Island with a lagoon — 2019-01-21
• Lagoon surrounder — 2018-08-01
• Chain unit, maybe — 2017-11-17
• Something ring-shaped — 2017-05-26
• Sight in Micronesia — 2017-04-20
• Ring in the ocean — 2016-12-14
• Ring-shaped reef — 2016-09-26
• Midway, e.g. — 2016-08-27
• Bikini, for one — 2016-04-19
• Island ring — 2016-04-11
• Snorkeling mecca — 2016-03-25
• Lagoon surrounder — 2014-09-23
• Coral ring — 2014-04-30
• Key ring? — 2013-12-28
• Coral formation — 2013-04-08
• Lagoon encloser — 2012-12-09
• Coral island — 2012-09-18
• Many a South Seas island — 2012-08-13
• Lagoon encircler — 2012-08-06
• Coral Sea sight — 2012-03-27
• Coral reef isle — 2012-02-28
• Midway, e.g. — 2012-02-04
• Wake Island, e.g. — 2011-06-12
• Ocean ring — 2011-06-02
• Bikini Island, e.g. — 2011-03-14
• Bikini, for one — 2011-03-02