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Update market hours database: add 2028 NYSE holidays and early closes#9407

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Ruuudy1 wants to merge 1 commit intoQuantConnect:masterfrom
Ruuudy1:feature-mhdb-2028-usa-holidays
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Update market hours database: add 2028 NYSE holidays and early closes#9407
Ruuudy1 wants to merge 1 commit intoQuantConnect:masterfrom
Ruuudy1:feature-mhdb-2028-usa-holidays

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@Ruuudy1 Ruuudy1 commented Apr 15, 2026

Add 9 full-closure holidays and 2 early closes (1:00 p.m. ET) for calendar year 2028 to the Equity-usa-[*] entry in market-hours-database.json. Dates sourced from the NYSE hours and calendars page and the OPM federal holiday schedule.

Description

Add 9 full-closure holidays and 2 early closes (1:00 p.m. ET) for calendar year 2028 to the Equity-usa-[*] entry in market-hours-database.json. Dates sourced from the NYSE hours and calendars page and the OPM federal holiday schedule.

Related Issue

Closes #9406

Motivation and Context

Keeps the MHDB current so LEAN correctly identifies trading days and session hours for US equity securities through 2028.

Requires Documentation Change

N/A

How Has This Been Tested?

Validated JSON with python3 json.load. Build passed locally with 0 errors.

Types of changes

  • Bug fix / data update (non-breaking)

Checklist:

  • My code follows the code style of this project.
  • I have read the CONTRIBUTING document.
  • All new and existing tests passed.

Add 9 full-closure holidays and 2 early closes (1 pm ET) for calendar year 2028
to the Equity-usa-[*] entry in market-hours-database.json. Dates sourced from
the NYSE hours and calendars page and verified against the OPM federal holiday schedule.
@Ruuudy1 Ruuudy1 closed this Apr 20, 2026
@Ruuudy1 Ruuudy1 deleted the feature-mhdb-2028-usa-holidays branch April 20, 2026 17:11
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Update Market Hours DataBase to 2028

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