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Add South Korea Constitution Day (from 2026) and June 2026 election holiday - #2685

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Add South Korea Constitution Day (from 2026) and June 2026 election holiday#2685
PureSaber wants to merge 1 commit into
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PureSaber:fix/southkorea-constitution-day-2026-election

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@PureSaber

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Summary

  • Reinstate Constitution Day (July 17) as a South Korea public holiday from 2026 onward (it was coded only through 2007).
  • Add the 2026-06-03 local election day to the Election Days list.
  • Update settlement and KRX expected holiday lists in test-suite/calendars.cpp.

KRX closed securities/derivatives markets on both dates after the government reinstated Constitution Day and designated local election day as a public holiday.

Test plan

  • CI: testSouthKoreanSettlement / KRX calendar tests
  • Spot-check: SouthKorea treats 2026-06-03 and 2026-07-17 as holidays; 2008-07-17 remains a business day (weekday between 2008 and 2025).

…oliday.

Constitution Day was reinstated as a public holiday in 2026 and KRX closed on
both July 17 and local election day June 3; update calendar and tests.

Co-authored-by: Cursor <cursoragent@cursor.com>
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CLAassistant commented Jul 27, 2026

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All committers have signed the CLA.

@boring-cyborg

boring-cyborg Bot commented Jul 27, 2026

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Thanks for opening this pull request! It might take a while before we look at it, so don't worry if there seems to be no feedback. We'll get to it.

@lballabio

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Thanks for contributing! May you check the CLAassistant comment above?

@lballabio

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More tests need updating

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3 participants