21. For instance, the Muslims'adoption of the Christian solar calendar and holidays was an exclusively Andalusi phenomenon. 22. Here, the almost 11 Days of difference between a lunar and solar calendar should be considerable. 23. They were used in Iran in early 20th century when the solar calendar was being used. 24. In the Sumerian and lunar and solar calendars roughly aligned, though this was not always achieved. 25. The reforms of Julius Caesar in 45 BC put the Roman world on a solar calendar . 26. The Gregorian calendar, widely accepted as standard in the world, is an example of solar calendar . 27. Each year coincides with the corresponding Gregorian year ( and so is a solar calendar ). 28. Other lunar calendars often include extra months added occasionally to synchronize it with the solar calendar . 29. The Poundian calendar is an arithmetical solar calendar . 30. The ruin is special as it houses a solar calendar , a cube-shaped rock, in its stupa.
