Calendar : 4500 BC to 4500 AD 1.2

This application provides a comprehensive tool for determining the day of the week for any date spanning from 4500 BC to 4500 AD, covering over nine thousand years. It also offers visualizations of lunar phases and planetary positions, facilitating both educational and practical use.

• Supports over 30 calendar languages, including English, Chinese, Korean, Japanese, Dutch, German, Russian, French, Swedish, Turkish, Icelandic, Danish, Spanish, Norwegian, Hindi, Ukrainian, Tamil, Malay, Portuguese, Czech, Slovak, Hungarian, Serbian, Romanian, Macedonian, Laotian, Latvian, Polish, Croatian, and Indonesian. Instant language switching enhances usability for diverse users.
• Includes Julian Date calculations starting at noon on January 1, 4713 B.C., with example conversions such as 00:30 UT on January 1, 2013 (Julian Date 2456293.52).
• Features an Islamic (Hijri) lunar calendar that accounts for observational variability.
• Displays the traditional Chinese lunisolar calendar with detailed date descriptions in Chinese characters.
• Provides the Korean lunar calendar used for culturally significant dates like Lunar New Year and Mid-Autumn Festival.
• Offers an interactive 3D model of the solar system and Earth-Moon system for easy navigation and planetary position visualization across a vast historical and future timeline.
• Allows user to set week start days to either Sunday or Monday through two distinct modes: starting on Sunday or Monday.
• Enables precise date difference calculations in days, months, and years—for example, computing the interval between May 20, 2018, and May 20, 1990.
• Includes a Julian Calendar Converter useful for historical research. For example, illustrating that the October Revolution on October 25, 1917 (Julian), corresponds to November 7 in the Gregorian calendar.