Examples
Examples
Try the starting example
- Events: ID, local YYYY-MM-DDTHH:MM, UTC offset minutes east positive, symmetric timestamp uncertainty minutes
- A,2026-10-20T10:00,60,1 B,2026-10-20T10:05,60,2 C,2026-10-20T09:02,0,2
- Event IDs ordered by central UTC timestamp
- A, C, B
- Definitely ordered event pairs
- A<B
- Pairs with overlapping/touching uncertainty intervals
- A/C, B/C
- Earliest possible UTC time by event
- A: 2026-10-20T08:59; B: 2026-10-20T09:03; C: 2026-10-20T09:00
- Latest possible UTC time by event
- A: 2026-10-20T09:01; B: 2026-10-20T09:07; C: 2026-10-20T09:04
Try another scenario
- Events: ID, local YYYY-MM-DDTHH:MM, UTC offset minutes east positive, symmetric timestamp uncertainty minutes
- A,2026-10-20T10:00,60,1 B,2026-10-20T10:05,60,2 C,2026-10-20T09:02,0,0
- Event IDs ordered by central UTC timestamp
- A, C, B
- Definitely ordered event pairs
- A<B, A<C, C<B
- Pairs with overlapping/touching uncertainty intervals
- None
- Earliest possible UTC time by event
- A: 2026-10-20T08:59; B: 2026-10-20T09:03; C: 2026-10-20T09:02
- Latest possible UTC time by event
- A: 2026-10-20T09:01; B: 2026-10-20T09:07; C: 2026-10-20T09:02
Calculation method
Calculation method
Event IDs ordered by central UTC timestamp
Central UTC=local fixed-offset time−declared offset; ties retain input order.
Definitely ordered event pairs
A is definitely before B only when latest(A)<earliest(B).
Pairs with overlapping/touching uncertainty intervals
Intervals overlap or touch, so strict order is not proven.
Earliest possible UTC time by event
Central UTC−supplied symmetric uncertainty.
Latest possible UTC time by event
Central UTC+supplied symmetric uncertainty.
Symbols and units
- a
- Events: ID, local YYYY-MM-DDTHH:MM, UTC offset minutes east positive, symmetric timestamp uncertainty 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
- A supplied timestamp-uncertainty chronology. Central-time sorting does not establish causality; overlapping intervals remain unordered. No timezone database, DST inference, clock synchronization or forensic record collection is performed.
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
Background reading; this does not imply endorsement or independent review of SumFizz.