Historical clue formulations

• Industry showcase — 2026-07-14
• Fair — 2025-12-18
• World's fair, e.g. — 2025-11-05
• Trade show — 2025-10-26
• Convention center event — 2025-07-07
• National, formerly — 2024-10-26
• Trade show — 2023-10-10
• Big name in dry-erase markers — 2023-03-20
• Event at a convention center — 2022-11-09
• Industry show — 2022-06-12
• Fair — 2022-04-15
• Convention center event — 2021-12-12
• Show with booths — 2021-05-26
• Fair — 2020-10-22
• Event at a convention center — 2020-04-26
• Fair — 2020-02-13
• Brand of markers — 2019-08-11
• Really big show — 2019-08-04
• Large fair, informally — 2019-07-29
• Big fair — 2019-04-22
• Trade show — 2019-03-06
• Brand of dry-erase markers — 2018-07-24
• Fair — 2018-07-01
• Fair with booths — 2017-12-18
• 1967 Montreal event — 2017-10-10
• Business fair — 2017-09-11
• Fair — 2017-06-15
• World's fair, for short — 2017-02-27
• Event at a convention center — 2017-02-22
• Comic-Con, e.g. — 2017-01-18
• World's fair, e.g. — 2017-01-02
• Comic Con, for one — 2016-11-02
• World's fair, e.g. — 2015-12-09
• Place for a pavilion — 2015-10-21
• Montreal baseballer, once — 2015-09-22
• Fair — 2015-03-26
• Event that may have a "-con" suffix in its name — 2015-01-14
• Fair — 2014-09-18
• World's fair — 2014-02-19
• World's fair, e.g. — 2013-08-13
• World's fair — 2013-07-15
• Big show — 2013-05-12
• Big show — 2012-05-17
• World's fair, e.g. — 2012-04-02
• Fair — 2012-02-17
• Fair — 2011-12-22
• Site of some unveilings — 2011-10-07
• Event with booths — 2011-09-27
• Int'l fair — 2011-09-12
• Place for a pavilion — 2011-09-07