Elizabeth I dies and James VI of Scotland accedes to the English throne. Elizabeth I died childless so was succeeded by her cousin, James VI of Scotland, who henceforth assumed the title of James I of England as well.
T minus zero means out of time.. This comes from a countdown convention used in by both the American military and NASA. Generally, it is used when counting down to a major event that will happen at a specific time. Mathematically, T is time, minus whatever amount of time is left until the event happens.
The Prime Meridian runs through Greenwich, England, hence the name Greenwich Mean. Time or GMT . All over the planet it is the same time. Some people use the names Z or Zulu and UTC or Universal Time Coordinates. instead of GMT . GMT , Z, Zulu and UTC all mean the same thing - the current time at the Prime Meridian. When converting from GMT to local time, first consider the GMT as military time (24 hour clock). Next, the local time is converted to an AM/PM time, if needed. Consider 2300Z as 2300 hours (basically changing Z time to a 24 clock).