Worked timestamp examples for "A workout on the wrong day".

timestamp-examples.csv  Invented instants converted with Python zoneinfo (IANA tz database
on the writer's machine). Re-run the conversions if your tz database is older or newer.
FIT check for 2026-06-20T22:45:00Z: Unix 1781995500 - 631065600 = FIT 1150929900.
Not a real athlete's travel history; no file was decoded or uploaded.