Historically distinct IANA time zone
America/Hermosillo
- Countries
- Mexico
- GPS reference
- 29.07° N, 110.97° W
- Data source
- IANA northamerica
- Aliases
- None
- Rule groups
- Mexico
MexicoSonora
Geographic context
Where this clock belongs
The map marks the IANA reference location and associated country, not a time-zone boundary.
GPS reference: 29.07° N, 110.97° W. Associated countries: MX.
The Wikipedia link provides additional context; it is not evidence for a historical claim. Transition data comes from the IANA source file.
Notes from the time database
The story behind the clock
These source notes describe a period or rule. They do not, by themselves, establish a causal claim for a particular clock change.
War
Original IANA source file: northamerica.
A shared present
Same clock today, different past
These nearby zones follow the same current annual pattern, yet retain their own historical record.
United States of America · 498 km from the reference location · Same annual clock since 1999
Canada · 2277 km from the reference location · Same annual clock since 1999Civil-time record
Recorded changes over time
From 1922 to 1998 · 13 recorded transitions
Recurring daylight-saving changes are grouped separately when JavaScript is available.
Notable changes
One-off changes and transitions outside the recurring seasonal rhythm.
- -07:00 · MSTStandard time applies
- -06:00 · CSTStandard time applies
- -07:00 · MSTStandard time applies
- -06:00 · MDTDaylight saving time begins
- -07:00 · MSTStandard time applies
- -06:00 · CSTStandard time applies
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1922-01-01 00:00 | -07:00 | MST | Standard time |
| 1927-06-10 01:00 | -06:00 | CST | Standard time |
| 1930-11-14 23:00 | -07:00 | MST | Standard time |
| 1931-04-30 01:00 | -06:00 | MDT | Daylight saving time |
| 1931-09-30 23:00 | -07:00 | MST | Standard time |
| 1932-04-01 01:00 | -06:00 | CST | Standard time |
| 1942-04-23 23:00 | -07:00 | MST | Standard time |
| 1996-04-07 03:00 | -06:00 | MDT | Daylight saving time |
| 1996-10-27 01:00 | -07:00 | MST | Standard time |
| 1997-04-06 03:00 | -06:00 | MDT | Daylight saving time |
| 1997-10-26 01:00 | -07:00 | MST | Standard time |
| 1998-04-05 03:00 | -06:00 | MDT | Daylight saving time |
| 1998-10-25 01:00 | -07:00 | MST | Standard time |