时间是发生的事件序列，以秒，分钟和小时等单位进行测量。
1 ly = 31,622,400 s
1 s = 3.1623e-8 ly
例子:
将15 闰年转换为第二：
15 ly = 474,336,000 s
| 闰年 | 第二 |
|---|---|
| 0.01 ly | 316,224 s |
| 0.1 ly | 3,162,240 s |
| 1 ly | 31,622,400 s |
| 2 ly | 63,244,800 s |
| 3 ly | 94,867,200 s |
| 5 ly | 158,112,000 s |
| 10 ly | 316,224,000 s |
| 20 ly | 632,448,000 s |
| 30 ly | 948,672,000 s |
| 40 ly | 1,264,896,000 s |
| 50 ly | 1,581,120,000 s |
| 60 ly | 1,897,344,000 s |
| 70 ly | 2,213,568,000 s |
| 80 ly | 2,529,792,000 s |
| 90 ly | 2,846,016,000 s |
| 100 ly | 3,162,240,000 s |
| 250 ly | 7,905,600,000 s |
| 500 ly | 15,811,200,000 s |
| 750 ly | 23,716,800,000 s |
| 1000 ly | 31,622,400,000 s |
| 10000 ly | 316,224,000,000 s |
| 100000 ly | 3,162,240,000,000 s |
规则