Days to Olympiads (d to olympiad)
1 day equals 0.0006844767517 olympiads (rounded).
How to convert days to olympiads
To convert days to olympiads, multiply the number of days by 0.0006844767517. The factor is rounded to 10 significant digits. To go the other way, multiply olympiads by 1,460.97.
olympiads = days × 0.0006844767517
Example: 10 days = 0.006844767517 olympiads.
Months and years are not constant. This site uses the average Gregorian year of 365.2425 days, so one 'year' converts to 365.2425 days, not 365; use 'common year' for exactly 365 days.
About these units
Day (d)
24 hours or 86,400 seconds. The mean solar day; the actual rotation of the Earth is about 4 minutes shorter (see sidereal day).
Old English dæg is the root of our day, with close cousins in German Tag, Dutch dag and Icelandic dagur, all descending from Proto-Germanic dagaz. It is the oldest unit here, because the cycle of light and dark needs no instrument. Yet the day we count is a constructed average: the actual interval from one noon to the next varies through the year by up to about 7.9 seconds, because Earth's orbit is elliptical and its axis is tilted.
Astronomers smooth this out with a fictitious mean Sun, giving the mean solar day, and the day in the SI sense is fixed at exactly 86,400 seconds. Reality has drifted slightly: the mean solar day has recently averaged about 86,400.002 seconds, and tidal drag from the Moon is lengthening it by about 2 milliseconds per century. That is why 27 leap seconds were added to UTC between 1972 and 2022. One rotation measured against the distant stars is shorter, about 23 hours 56 minutes 4.09 seconds, and a year contains one more of these sidereal days than solar days.
1 day = 86,400 seconds (exactly).
Sources: Wikipedia: Day; BIPM: SI Brochure, 9th edition
Olympiad (olympiad)
Four years, the interval between ancient Olympic Games. The Greeks dated events by the Olympiad.
Greek historians dated events by Olympiads, the four-year cycles that began with each celebration of the Games at Olympia. The traditional first Olympiad starts in the summer of 776 BC, the date given for the victory of Coroebus. Hippias of Elis compiled the first full list of victors, now lost, and Timaeus of Tauromenium used the system consistently in the 3rd century BC.
Some ancient writers called an Olympiad a five-year period, but that came from inclusive counting, and each cycle was in fact four years long. Because the Games took place in midsummer, an Olympiad year ran from one summer to the next and did not match the Roman consular year beginning in January. Early dates were applied backwards and are less reliable. The modern Olympiad is also four years, but it starts on 1 January of years divisible by four, beginning with 1896. Four Gregorian years is about 126.2 million seconds.
1 olympiad = 126,227,808 seconds (exactly).
Sources: Wikipedia: Olympiad
Related conversions
- Olympiads to days (reverse)
- Days to seconds
- Days to minutes
- Days to hours
- Days to weeks
- Days to months
- Days to years
- Days to milliseconds
- Days to microseconds
- Days to nanoseconds
- Days to decades
- Days to centuries
- Days to millennia
- Seconds to olympiads
- Minutes to olympiads
- Hours to olympiads
- Weeks to olympiads
- Months to olympiads
- Years to olympiads
See all time units.