0dteclose Arm a rule

0DTE on early-close days: SPX, SPY and QQQ

CalendarEarly closeverified 2026-09-26

The market closes at 1:00pm ET and 0DTE contracts settle on that close. User-set 3:30/3:45/3:50 checks are shifted relative to the 1:00pm close — the simulator runs your strike against that close.

Next Early close date in the calendar file: — Early close 1:00pm ET - 0DTE settles at 1:00pm (NYSE holidays and trading hours, verified 2026-09-26).

Simulator SPX

your strike at the close

Every Early close date in the calendar file, with its primary source
DateDayEventWhat the archive will showSource
2026-11-27FridayEarly close Early close 1:00pm ET - 0DTE settles at 1:00pm
day after Thanksgiving		0DTE settles at 1:00pm ET; the archive's close is the 1:00pm official close. SPX/SPY/QQQ session pages after the close on 2026-11-27NYSE holidays and trading hours (www.nyse.com)
verified 2026-09-26
2026-12-24ThursdayEarly close Early close 1:00pm ET - 0DTE settles at 1:00pm
Christmas Eve		0DTE settles at 1:00pm ET; the archive's close is the 1:00pm official close. SPX/SPY/QQQ session pages after the close on 2026-12-24NYSE holidays and trading hours (www.nyse.com)
verified 2026-09-26

Across early-close days

n = 0 archived early-close days: no statistics until 5 archived instances — the per-session numbers are below as each date passes.

Quick answers

What changes on an early-close day?

The market closes at 1:00pm ET and 0DTE contracts settle on that close. User-set 3:30/3:45/3:50 checks are shifted relative to the 1:00pm close — the simulator runs your strike against that close.

When is the next Early close day?

2026-11-27 (Friday): Early close 1:00pm ET - 0DTE settles at 1:00pm, per the NYSE holidays and trading hours (verified 2026-09-26).

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