Sources & Methodology
CalendarHours uses location-aware, date-aware time-zone logic rather than permanently hardcoding New Mexico as UTC−7 or UTC−6. America/Denver supplies the Mountain Time rules used throughout the state.
The IANA Time Zone Database is the primary rules source for civil offsets and transitions. The latest release verified for this page is tzdb 2026c, released July 8, 2026. U.S. daylight-saving dates are checked against NIST. New Mexico's 33-county structure is checked against state and county-government sources, the Central–Mountain border context against 49 CFR §71.7, and the 2026 permanent-DST proposal against official New Mexico Legislature records.
Reviewed August 20, 2026. This URL is evergreen; live clocks, current abbreviations and UTC offsets update automatically from supported browser time-zone data.