sessions_london
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 2026-09-20, from us-stock-market-hours-london-time.
| segment | new_york_et | london_summer_bst | london_winter_gmt | london_four_hour_weeks |
|---|---|---|---|---|
| Pre-market | 04:00 to 09:30 ET | 09:00 to 14:30 | 09:00 to 14:30 | 08:00 to 13:30 |
| Regular session | 09:30 to 16:00 ET | 14:30 to 21:00 | 14:30 to 21:00 | 13:30 to 20:00 |
| Early close (half day) | 09:30 to 13:00 ET | 14:30 to 18:00 | 14:30 to 18:00 | 13:30 to 17:00 |
| After-hours | 16:00 to 20:00 ET | 21:00 to 01:00 | 21:00 to 01:00 | 20:00 to 00:00 |
- Rows × columns
- 4 × 5
- 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 |
|---|---|---|---|
segment |
text | 4 distinct values | |
new_york_et |
text | 4 distinct values | |
london_summer_bst |
text | 4 distinct values | |
london_winter_gmt |
text | 4 distinct values | |
london_four_hour_weeks |
text | 4 distinct values |
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
'2026-07-15' AS summer_day,
'2026-01-15' AS winter_day,
'2026-03-16' AS gap_day
SELECT
segment,
concat(et_start, ' to ', et_end, ' ET') AS new_york_et,
concat(formatDateTime(toTimeZone(toDateTime(concat(summer_day, ' ', et_start, ':00'), 'America/New_York'), 'Europe/London'), '%H:%i'),
' to ',
formatDateTime(toTimeZone(toDateTime(concat(summer_day, ' ', et_end, ':00'), 'America/New_York'), 'Europe/London'), '%H:%i')) AS london_summer_bst,
concat(formatDateTime(toTimeZone(toDateTime(concat(winter_day, ' ', et_start, ':00'), 'America/New_York'), 'Europe/London'), '%H:%i'),
' to ',
formatDateTime(toTimeZone(toDateTime(concat(winter_day, ' ', et_end, ':00'), 'America/New_York'), 'Europe/London'), '%H:%i')) AS london_winter_gmt,
concat(formatDateTime(toTimeZone(toDateTime(concat(gap_day, ' ', et_start, ':00'), 'America/New_York'), 'Europe/London'), '%H:%i'),
' to ',
formatDateTime(toTimeZone(toDateTime(concat(gap_day, ' ', et_end, ':00'), 'America/New_York'), 'Europe/London'), '%H:%i')) AS london_four_hour_weeks
FROM
(
SELECT
i,
arrayElement(['Pre-market', 'Regular session', 'Early close (half day)', 'After-hours'], i) AS segment,
arrayElement(['04:00', '09:30', '09:30', '16:00'], i) AS et_start,
arrayElement(['09:30', '16:00', '13:00', '20:00'], i) AS et_end
FROM
(
SELECT arrayJoin([1, 2, 3, 4]) AS i
)
)
ORDER BY i