Many times can surround one event
A message time, discovery time, reported departure and actual occurrence may all appear near the same part of a case. The most prominent timestamp is not automatically the moment you need to identify. Read the report question in relation to the supplied evidence, then distinguish the event itself from later communication about it.
Worked example: the late message
A message at 21:00 describes something that happened before dinner. Using 21:00 as the event time collapses reporting into occurrence. Another record may narrow the earlier window. If the file supports only a range at that stage, keep the range while you compare the remaining anchors rather than choosing the exact-looking number because it is easier to enter in your notes.
Audit the sequence around it
Ask what must be true immediately before and after your proposed moment, and which records support those conditions. In Somatry, the moment should fit the same identity and method explanation as the rest of the report. A timestamp that solves one local contradiction but breaks the surrounding sequence needs re-examination. Precision is useful when it comes from the evidence; otherwise it can disguise an unresolved choice behind the appearance of an exact answer.