Winals to Days (winal to d)
1 winal equals 20 days exactly.
How to convert winals to days
To convert winals to days, multiply the number of winals by 20. This factor is exact. To go the other way, multiply days by 0.05.
days = winals × 20
Example: 10 winals = 200 days.
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
Winal (winal)
20 days, the Maya 'month' of the Long Count.
A winal, also spelled uinal, is a block of 20 days and the second-smallest step in the Maya Long Count. It is often likened to a month, though it has nothing to do with the moon. Twenty kʼin fill one winal, which matches the 20 named days that cycle through the Maya sacred calendar and the 20-day months of the civil year.
On monuments the winal is the fourth number in a Long Count date, ahead of the kin. Its count runs from 0 to 17 and not to 19, because 18 winals make one tun of 360 days. This is the point where the otherwise base-20 system departs from pure powers of twenty. One carved example is a full-figure winal sign on Stela D at Copan.
At 20 days, a winal equals 1,728,000 seconds and is a little under three weeks. No modern calendar unit corresponds to it closely, and it is an exact count of days with no ambiguity about its size.
1 winal = 1,728,000 seconds (exactly).
Sources: Wikipedia: Winal; Wikipedia: Maya calendar; Steve Morse: Mayan Calendar Rules
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
Related conversions
- Days to winals (reverse)
- Winals to seconds
- Winals to minutes
- Winals to hours
- Winals to weeks
- Winals to months
- Winals to years
- Seconds to days
- Minutes to days
- Hours to days
- Weeks to days
- Months to days
- Years to days
- Milliseconds to days
- Microseconds to days
- Nanoseconds to days
- Decades to days
- Centuries to days
- Millennia to days
See all time units.