The Greenwichmeridian was adopted in 1884 by the International meridian Conference as the line with zero degrees of longitude.
国际本初子午线大会于1884年把横过英国格林尼治天文台的一条经线定为参考线，在该线上经度为零。
2
GMT is a universal time zone, based on the Greenwichmeridian corrected by the longitude of the location in which the time is set.
GMT是一种通用时区，是根据格林威治子午线，用设定时间所在位置的经度与其求差计算出来的。
3
The rare lunar eclipse has fallen on the winter solstice at the Greenwichmeridian of December 21, 2010, making the day the "darkest" ever in 372 years.