All corrections
Wikipedia April 30, 2026 at 11:51 PM

en.wikipedia.org/wiki/Marvin_Heemeyer

1 correction found

1
Claim
4:30 p.m. MST
Correction

Colorado was on daylight saving time on June 4, 2004, so the local time would have been 4:30 p.m. MDT, not MST.

Full reasoning

This timestamp uses the wrong time-zone abbreviation. On June 4, 2004, daylight saving time was in effect in the United States. NASA's historical DST table shows that in 2004 U.S. daylight saving time ran from April 4 to October 31. NIST explains that during daylight saving time, clocks are moved one hour ahead of standard time.

Because the event took place in Granby, Colorado on June 4, 2004, the local Mountain-zone abbreviation at 4:30 p.m. would have been MDT (Mountain Daylight Time), not MST (Mountain Standard Time).

2 sources
  • NASA - Daylight Saving Time

    US Federal law was amended in 1986 to begin Daylight Saving Time on the first Sunday of April ... 2004 April 04 ... October 31.

  • Daylight Saving Time Rules | NIST

    Daylight saving time, or DST, is the period of the year when clocks are moved one hour ahead ... The transition from ST to DST has the effect of moving one hour of daylight from the morning to the evening.

Model: OPENAI_GPT_5 Prompt: v1.16.0