dst_offset
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 2026-10-02, from when-historical-market-data-is-revised.
| session_date | session_label | first_bar_utc | first_bar_et | et_utc_offset_hours |
|---|---|---|---|---|
| 2025-10-27 | Oct 27 | 08:00 | 04:00 | -4 |
| 2025-10-28 | Oct 28 | 08:00 | 04:00 | -4 |
| 2025-10-29 | Oct 29 | 08:00 | 04:00 | -4 |
| 2025-10-30 | Oct 30 | 08:00 | 04:00 | -4 |
| 2025-10-31 | Oct 31 | 08:00 | 04:00 | -4 |
| 2025-11-03 | Nov 3 | 09:00 | 04:00 | -5 |
| 2025-11-04 | Nov 4 | 09:00 | 04:00 | -5 |
| 2025-11-05 | Nov 5 | 09:00 | 04:00 | -5 |
| 2025-11-06 | Nov 6 | 09:00 | 04:00 | -5 |
| 2025-11-07 | Nov 7 | 09:00 | 04:00 | -5 |
- Rows × columns
- 10 × 5
- Period covered
- to
- 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_date |
date | 2025-10-27 to 2025-11-07 | |
session_label |
text | 10 distinct values (Nov 3, Nov 4, Nov 5…) | |
first_bar_utc |
text | 2 distinct values (08:00, 09:00) | |
first_bar_et |
text | 1 distinct value (04:00) | |
et_utc_offset_hours |
number | -5 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.
SELECT
toString(toDate(toTimeZone(window_start, 'America/New_York'))) AS session_date,
formatDateTime(toDate(toTimeZone(window_start, 'America/New_York')), '%b %e') AS session_label,
formatDateTime(min(window_start), '%H:%i') AS first_bar_utc,
formatDateTime(toTimeZone(min(window_start), 'America/New_York'), '%H:%i') AS first_bar_et,
toInt16(toHour(toTimeZone(min(window_start), 'America/New_York')))
- toInt16(toHour(min(window_start))) AS et_utc_offset_hours
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'AAPL'
AND window_start >= '2025-10-27 04:00:00'
AND window_start < '2025-11-08 05:00:00'
GROUP BY session_date, session_label
ORDER BY session_date
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