Examples
Examples
Try the starting example
- Days: date, supplied sunrise HH:MM, supplied sunset HH:MM, start HH:MM, walking minutes, break minutes
- 2026-10-20,07:30,18:00,09:00,300,60 2026-10-21,07:31,17:59,13:00,240,30
- Supplied finish-before-sunset buffer (minutes)
- 30
- Modeled finish timestamp by day
- 2026-10-20: 2026-10-20T15:00; 2026-10-21: 2026-10-21T17:30
- Sunset minus finish minus supplied buffer (minutes)
- 2026-10-20: 150; 2026-10-21: -1
- Elapsed itinerary minutes outside supplied daylight
- 2026-10-20: 0; 2026-10-21: 0
- Days below supplied finish-before-sunset buffer
- 2026-10-21
Try another scenario
- Days: date, supplied sunrise HH:MM, supplied sunset HH:MM, start HH:MM, walking minutes, break minutes
- 2026-10-20,07:30,18:00,09:00,300,60 2026-10-21,07:31,17:59,13:00,240,30
- Supplied finish-before-sunset buffer (minutes)
- 0
- Modeled finish timestamp by day
- 2026-10-20: 2026-10-20T15:00; 2026-10-21: 2026-10-21T17:30
- Sunset minus finish minus supplied buffer (minutes)
- 2026-10-20: 180; 2026-10-21: 29
- Elapsed itinerary minutes outside supplied daylight
- 2026-10-20: 0; 2026-10-21: 0
- Days below supplied finish-before-sunset buffer
- None
Calculation method
Calculation method
Modeled finish timestamp by day
Start plus supplied whole walking/break minutes, allowing finish after midnight.
Sunset minus finish minus supplied buffer (minutes)
Signed sunset−finish−buffer; a negative value is below the entered buffer.
Elapsed itinerary minutes outside supplied daylight
Elapsed itinerary interval minus its overlap with the supplied sunrise-to-sunset interval, including breaks.
Days below supplied finish-before-sunset buffer
List days whose signed finish-buffer margin is negative.
Symbols and units
- a
- Days: date, supplied sunrise HH:MM, supplied sunset HH:MM, start HH:MM, walking minutes, break minutes
- b
- Supplied finish-before-sunset buffer (minutes)
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
- An elapsed-time comparison to user-supplied daylight bounds. No sunrise calculation, location lookup, twilight allowance, weather or route-safety assessment is performed; meeting the supplied buffer is not a travel assurance.
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: ratios and rates; all itinerary rates, limits and scenario rules are supplied inputs ↗
Background reading; this does not imply endorsement or independent review of SumFizz.