Examples
Examples
Try the starting example
- Trip start date
- 2026-12-01
- Supplied release lead time (calendar days)
- 60
- Release local wall time HH:MM
- 09:00
- Fixed local UTC offset in minutes
- -480
- As-of UTC timestamp
- 2026-10-01T17:00:00Z
- Local release date and wall time
- 2026-10-02 09:00
- Release timestamp in UTC
- 2026-10-02T17:00:00.000Z
- Hours until release from as-of
- 24
- Entered booking-window state
- Not yet open
Try another scenario
- Trip start date
- 2026-12-01
- Supplied release lead time (calendar days)
- 60
- Release local wall time HH:MM
- 09:00
- Fixed local UTC offset in minutes
- -480
- As-of UTC timestamp
- 2026-10-03T17:00:00Z
- Local release date and wall time
- 2026-10-02 09:00
- Release timestamp in UTC
- 2026-10-02T17:00:00.000Z
- Hours until release from as-of
- -24
- Entered booking-window state
- Already open
Calculation method
Calculation method
Local release date and wall time
Trip start date − supplied release days, at the entered local wall time.
Release timestamp in UTC
Local civil date/time represented as UTC, minus the fixed UTC-offset minutes.
Hours until release from as-of
(Release UTC − as-of UTC)/3,600,000. Negative means the release time has passed.
Entered booking-window state
Already open when release≤as-of; otherwise Not yet open.
Symbols and units
- a
- Trip start date
- b
- Supplied release lead time (calendar days)
- c
- Release local wall time HH:MM
- d
- Fixed local UTC offset in minutes
- e
- As-of UTC timestamp
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Applies only the release rule you supply, using a FIXED numeric UTC offset at release. No permit policy or daylight-saving timezone rule is inferred. Check the provider’s actual release terms separately.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: arithmetic and geometry ↗
Background reading; this does not imply endorsement or independent review of SumFizz.