| 21. | Before Oenopides a Great Year of eight solar years was in use ( = 99 months ).
|
| 22. | The table below shows the solar years of both systems in comparison with the actual mean tropical year.
|
| 23. | It was used as an instrument to check the congruence of the civil calendar with the solar year.
|
| 24. | This resulted in an observationally based lunar calendar that shifts relative to the seasons of the solar year.
|
| 25. | Thus by adding seven intercalary months in nineteen years, the solar years and the lunar years basically synchronize.
|
| 26. | For the 2018 edition, the eligibility period will be the 2017 solar year ( January to December ).
|
| 27. | The niches on the original structure, not counting those on the later stairway, total 365, the solar year.
|
| 28. | Friend designed a grove of 13 oaks, one for each cycle of the moon in the solar year.
|
| 29. | :: As for daylight hours-those depend, of course, on the time of solar year and not on our calendars.
|
| 30. | Furthermore, the Gregorian calendar drops 3 leap days every 400 years to closely approximate the length of a solar year.
|
