Interactive publication
Back to the catalogueDate lineCase 02 of 02
Extreme offset span (UTC−12 … +14)
The inhabited world spans 26 hours of offset, so a single local hour exists across a more-than-24-hour span of UTC instants. A local daypart aggregated across many zones can therefore occupy a UTC slot-set that wraps the entire week.
Class
Case to account for
Affects
2 conversions
01
Detection
Aggregation spans zones whose offsets differ by more than 24 hours.
02
Mitigation
01
Keep per-zone slot-sets; union only in UTC, and expect week-wrap.
03
Affected conversions
Daypart (local band) ⇄ UTC slot-set
OPENsemantics
OPENMore in Date line
Date-line weekday divergence