IANA-derived clock changes

Global DST Dashboard

Browse IANA-derived daylight-saving and civil-time transitions for 2026, 2027, 2028, including regional exceptions and non-hour changes.

2026 changes

191 IANA-zone offset transitions.

2027 changes

190 IANA-zone offset transitions.

2028 changes

190 IANA-zone offset transitions.

DST is a zone rule, not a country-wide assumption

Every transition is calculated from a named IANA time zone. This preserves Arizona-like exceptions, half-hour changes, Southern Hemisphere schedules and regions within the same country that follow different rules.

Country DST references

Australia2026 regional clock changes and exceptionsUnited States2026 regional clock changes and exceptionsUnited Kingdom2026 regional clock changes and exceptionsCanada2026 regional clock changes and exceptionsNew Zealand2026 regional clock changes and exceptions

See the methodology and data sources for calculation and update details.