Clock Changes in Lava Flow of 1887, Hawaii, USA

Daylight Saving Time (DST) Not Observed in Year 2025

USA currently observes 6 time zones all year.

Daylight Saving Time has not been used since our records start, in 1970.

DST data from before 1970 is not available for Lava Flow of 1887, USA. However, we have earlier DST history for Honolulu, USA available.

Which countries & states use DST and which do not?