March 10, 1884 The [District] Time Bill was passed -- establishing the 75th meridian time for the District -- March 11, 1884 Washington Post.
An article the previous October (October 26, 1883) explained that this would move time in Washington ahead 8 minutes and 12 seconds.
This was a follow up to the adoption of the recommendations of the General Time convention which established the time zones with which we are familiar. Those time zones went into effect November 18, 1883.
Sunday, March 14, 2010
A timely history lesson
From H-DC's Matthew Gilmore: