The civil calendar; a civil day begins at meanmidnight.
民用日历；从正午夜开始的民用日。
2
The image was taken approximately 38 minutes after midnight Greenwich Mean Time (GMT), while the International Space Station was located over the southern Atlantic Ocean.
这张图片大致拍摄于格林尼治时间凌晨0：38，此时，国际空间站正位于南大西洋上空。
3
If a neighbor have a baby who cries a long time at midnight, or if he starts playing a music instrument, these situations mean some tolerance is required.