Longest breaks between US trading sessions, January to late July 2026
Answered against 22 years of US equities and 12 years of US options data and published with the query that produced it. This result is stored as of 2026-08-01, from When Do Mutual Fund Trades Settle?.
| session_pair | calendar_days |
|---|---|
| Fri Jan 16 to Tue Jan 20 | 4 |
| Fri Feb 13 to Tue Feb 17 | 4 |
| Thu Apr 2 to Mon Apr 6 | 4 |
| Fri May 22 to Tue May 26 | 4 |
| Thu Jun 18 to Mon Jun 22 | 4 |
| Thu Jul 2 to Mon Jul 6 | 4 |
| Fri Jan 2 to Mon Jan 5 | 3 |
| Fri Jan 9 to Mon Jan 12 | 3 |
| Fri Jan 23 to Mon Jan 26 | 3 |
| Fri Jan 30 to Mon Feb 2 | 3 |
- Rows × columns
- 10 × 2
- Computed
- Completeness
- No missing values
- Source
- US exchange, SIP and OPRA market data
- Licence
- Strasmore terms · free, no signup
What each column holds
| Column | Type | Range | Notes |
|---|---|---|---|
session_pair |
text | 10 distinct values | |
calendar_days |
number | 3 to 4 |
Computed from Strasmore's warehouse of US exchange, SIP and OPRA market data. Equity prices are delayed; options greeks and implied volatility are end-of-day. This result is stored, not recomputed on load — it is exactly the numbers that were returned on , and the query below is what returned them.
Run it yourself
This is the exact query behind the result above. Change a ticker, a date or a column and run it against the warehouse — no account, no key. The no-signup tier is smaller than the one this page was computed on; a query that reaches past it comes back saying which plan runs it.
WITH sessions AS (
SELECT DISTINCT toDate(toTimeZone(window_start, 'America/New_York')) AS session_date
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND toDate(toTimeZone(window_start, 'America/New_York')) BETWEEN toDate('2026-01-01') AND toDate('2026-07-24')
AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60
+ toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959
),
ordered AS (
SELECT arraySort(groupArray(session_date)) AS days
FROM sessions
),
pairs AS (
SELECT arrayJoin(arrayZip(arraySlice(days, 1, length(days) - 1), arraySlice(days, 2))) AS pair
FROM ordered
)
SELECT concat(formatDateTimeInJodaSyntax(pair.1, 'EEE MMM d'), ' to ',
formatDateTimeInJodaSyntax(pair.2, 'EEE MMM d')) AS session_pair,
dateDiff('day', pair.1, pair.2) AS calendar_days
FROM pairs
WHERE dateDiff('day', pair.1, pair.2) > 1
ORDER BY calendar_days DESC, pair.1 ASC
LIMIT 10
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