Missed my train STOP Mistake in schedule STOP 5:35 p.m. instead of 5:35 a.m. STOP Unable to leave for 12 hours STOP
In July 1876, Sandford Fleming missed a train for Londonderry in Bandoran, Ireland.
This incident led him to reflect on time and its definition. At the time, every town established its own local time on the basis of solar time.
The day was divided in two periods of twelve hours: forenoon (AM in latin: ante meridiem) and afternoon (PM in latin: post meridiem). Fleming first suggested that the day be divided into 24 consecutive hours rather than two periods of 12.
He then went even further, suggesting a new way of calculating time all over the world.