1907 - Uniform standard time.
§ 1907. Uniform standard time. Every mention of, or reference to any hour or time in any statute, shall be construed with reference to and in accordance with the mean solar time of the 75th meridian of longitude west of Greenwich, commonly called eastern standard time, unless a different standard is therein expressly provided for, or unless the standard time shall be advanced for any portion of the year, by any act of Congress.