| Year : 1922 - Hermosillo Mexico |
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| Back to standard time on sunday 01 january 1922 00 h 00 (GMT - 7 h ) MST |
| Year : 1927 - Hermosillo Mexico |
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| Back to standard time on friday 10 june 1927 01 h 00 (GMT - 6 h ) CST |
| Year : 1930 - Hermosillo Mexico |
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| Back to standard time on friday 14 november 1930 23 h 00 (GMT - 7 h ) MST |
| Year : 1931 - Hermosillo Mexico |
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| Transition to daylight saving time on thursday 30 april 1931 01 h 00 (GMT - 6 h ) MDT |
| Back to standard time on wednesday 30 september 1931 23 h 00 (GMT - 7 h ) MST |
| Year : 1932 - Hermosillo Mexico |
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| Back to standard time on friday 01 april 1932 01 h 00 (GMT - 6 h ) CST |
| Year : 1942 - Hermosillo Mexico |
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| Back to standard time on thursday 23 april 1942 23 h 00 (GMT - 7 h ) MST |
| Year : 1996 - Hermosillo Mexico |
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| Transition to daylight saving time on sunday 07 april 1996 03 h 00 (GMT - 6 h ) MDT |
| Back to standard time on sunday 27 october 1996 01 h 00 (GMT - 7 h ) MST |
| Year : 1997 - Hermosillo Mexico |
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| Transition to daylight saving time on sunday 06 april 1997 03 h 00 (GMT - 6 h ) MDT |
| Back to standard time on sunday 26 october 1997 01 h 00 (GMT - 7 h ) MST |
| Year : 1998 - Hermosillo Mexico |
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| Transition to daylight saving time on sunday 05 april 1998 03 h 00 (GMT - 6 h ) MDT |
| Back to standard time on sunday 25 october 1998 01 h 00 (GMT - 7 h ) MST |
