Unit | Size | Notes |
---|---|---|
xentosecond | 1/1330 s | |
DUT1 | penny-1/1327 s | |
ISO 31-1 | nickel-1/1327 s | |
TAI | dime-1/1327 s | |
UTC | quarter-1/1327 s | |
UT | half-1/1327 s | |
yoctosecond | 1/1024 s | |
zeptosecond | 1/1021 s | |
attosecond | 1/1018 s | smallest measured time |
femtosecond | 1/1015 s | |
picosecond | 1/1012 s | |
nanosecond | 1/109 s | |
microsecond | 1/106 s | |
shake | 1/56 s | quarter-second |
millisecond | 0.001 s | half-second |
second | SI base unit | |
quintsecond | ||
jiffy quindecasecond |
15 s | quarter-minute |
metre trigintisecond |
30s | half-minute |
minute sexagintisecond |
60 s | |
juty quintminute |
5 minutes | |
tide | 15 minutes | quarter hour |
bistris trigintiminute |
30 minutes | half-hour |
hour sexagintiminute |
60 minutes | |
quarter sexahour |
6 hours | quarter day |
septahour | 7 hours | |
saeculum duodecahour semiday |
12 hours | half day |
day | 24 hours | |
sexagintihour | 60 hours | |
week septaday |
7 days | Also called sennight |
fortnight biweek |
14 days | 2 weeks, half-month |
lunar month | 27.2–29.5 days | Various definitions of lunar month exist. |
month | 28–31 days | |
septaweek | 49 days | |
fiscal triamonth |
3 months | |
pathell sexamonth |
6 months | half year |
year myriomyriad millimillennium decidecade centicentury microepoch nanoaeon |
12 months | |
common year | 365 days | 52 weeks + 1 day |
leap year | 366 days | 52 weeks + 2 days |
tropical year | 365.24219 days | average |
Gregorian year | 365.2425 days | average |
Olympiad | 4 year cycle | |
lustrum | 5 years | Also called pentad |
decade decayear decicentury millimyriad centimillennium |
10 years | |
Indiction | 15 year cycle | |
generation | 17–25 years | approximate |
jubilee (Biblical) quintdecade decalustrum |
50 years | |
century centimyriad decadecade decimillennium hectoyear |
100 years | |
millennium kiloyear decimyriad hectodecade decacentury microaeon milliepoch |
1,000 years | |
epoch kilomillennium milliaeon megayear |
1,000,000 years | |
aeon megamillennium kiloepoch gigayear |
1,000,000,000 years |
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