The three Sydney opening times, counted from a year of SPY sessions
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 2026-11-01, from US Stock Market Hours in Sydney Time.
| sydney_open | sydney_full_day_close | hours_ahead_of_new_york | session_count |
|---|---|---|---|
| 23:30 | 06:00 | 14 | 126 |
| 00:30 | 07:00 | 15 | 40 |
| 01:30 | 08:00 | 16 | 85 |
- Rows × columns
- 3 × 4
- 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 |
|---|---|---|---|
sydney_open |
text | 3 distinct values (00:30, 01:30, 23:30) | |
sydney_full_day_close |
text | 3 distinct values (06:00, 07:00, 08:00) | |
hours_ahead_of_new_york |
number | 14 to 16 | |
session_count |
number | 40 to 126 | count |
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
sydney_open,
any(sydney_full_day_close) AS sydney_full_day_close,
any(hours_ahead_of_new_york) AS hours_ahead_of_new_york,
count() AS session_count
FROM
(
SELECT
toDate(toTimeZone(window_start, 'America/New_York')) AS session,
formatDateTime(toTimeZone(min(window_start), 'Australia/Sydney'), '%H:%i') AS sydney_open,
formatDateTime(toTimeZone(addMinutes(min(window_start), 390), 'Australia/Sydney'), '%H:%i') AS sydney_full_day_close,
modulo(toHour(toTimeZone(min(window_start), 'Australia/Sydney'))
- toHour(toTimeZone(min(window_start), 'America/New_York')) + 24, 24) AS hours_ahead_of_new_york
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND window_start >= today() - 369
AND window_start < today() - 4
AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60
+ toMinute(toTimeZone(window_start, 'America/New_York'))) >= 570
AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60
+ toMinute(toTimeZone(window_start, 'America/New_York'))) < 960
GROUP BY session
HAVING toHour(toTimeZone(min(window_start), 'America/New_York')) * 60
+ toMinute(toTimeZone(min(window_start), 'America/New_York')) = 570
)
GROUP BY sydney_open
ORDER BY hours_ahead_of_new_york
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