秒
| fractions of a second | metric name |
|---|---|
| 0,000 000 000 000 000 000 000 001 | yoctosecond [ ys ] |
| 0,000 000 000 000 000 000 001 | zeptosecond [ zs ] |
| 0,000 000 000 000 000 001 | attosecond [ as ] |
| 0,000 000 000 000 001 | femtosecond [ fs ] |
| 0,000 000 000 001 [ trillionth ] | picosecond [ ps ] |
| 0,000 000 001 [ billionth ] | nanosecond [ ns ] |
| 0,000 001 [ millionth ] | microsecond [ _µ_s ] |
| 0,001 [ thousandth ] | millisecond [ ms ] |
| 0.01 [ hundredth ] | centisecond [ cs ] |
| 1.0 | second [ s ] |
秒到年
| seconds to years | |
|---|---|
| 60 seconds | = 1 minute [ mean solar ] |
| 59.83617 seconds | = 1 minute [ sidereal ] |
| 60 minutes | = 1 hour |
| 24 hours | = 1 day |
| 3,600 seconds | = 1 hour |
| 86,400 seconds | = 1 day [ mean solar ] |
| 86,164.09 seconds | = 1 day [ sidereal ] |
| 7 days | = 1 week |
| 168 hours | = 1 week |
| 14 days | = 1 fortnight |
| 28, 29, 30 or 31 days | = 1 month |
| 365 days | = 1 year |
| 366 days | = 1 leap year |
| 12 months | = 1 year |
| 31,536,000 seconds | = 1 year [ calendar ] |
| 31,558,150 seconds | = 1 year [ sidereal ] |
| 31,556,930 seconds | = 1 year [ tropical ] |
| 9,460,550,000,000,000 metres | = 1 light year |
| 299,792,458 metres per second ( m/s ) | = speed of light |
| parsec | = approx. 3.25 light years |
周年纪念日
| year intervals – anniversaries | number of years |
|---|---|
| Biennial | 2 |
| Triennial | 3 |
| Quadrennial | 4 |
| Quinquennial | 5 |
| Hexennial * | 6 |
| Septennial | 7 |
| Octennial | 8 |
| Novennial | 9 |
| Decennial | 10 |
| Hendecennial * | 11 |
| Duodecennial | 12 |
| Tredecennial * | 13 |
| Quindecennial | 15 |
| Sextodecennial * | 16 |
| Septendecennial | 17 |
| Vigintennial * | 20 |
| Trigentennial * | 30 |
| Quadragennial | 40 |
| Quinquagenary | 50 |
| Sexagennial * | 60 |
| Septuagennial * | 70 |
| Septuagesiquintennial * | 75 |
| Octogintennial * | 80 |
| Nonagintennial * | 90 |
| Centennial | 100 |
| Quasquicentennial | 125 |
| Sesquicentennial | 150 |
| Terquasquicentennial or Septaquintaquinquecentennial * | 175 |
| Bicentennial | 200 |
| Quasquibicentennial * | 225 |
| Semiquincentennial * | 250 |
| Tercentennial | 300 |
| Semiseptcentennial * | 350 |
| Quatercentenary | 400 |
| Quincentennial | 500 |
| Sexcentennial * | 600 |
| Septcentennial * | 700 |
| Octocentennial | 800 |
| Millenial | 1,000 |
| Quindecimillenial | 15,000 |